| Site name
 | 
Reason for designation
 | 
Area
 | 
Location & map ref
 | 
Year in which notified
 | 
Other designations
 | 
Map/Refs
 | 
| Biological interest
 | 
Geological interest
 | 
Hectares
 | 
Acres
 | 
| Allington Meadows
 | 
 Y
 | 
 | 
3.8
 | 
9.3
 | 
52°56′53″N 0°42′25″W / 52.948°N 0.707°W / 52.948; -0.707 (Allington Meadows)      SK870397
 | 
1987
 | 
 | 
Map [2]
 | 
| Ancaster Valley
 | 
 Y
 | 
 | 
10.3
 | 
25.4
 | 
52°58′30″N 0°31′59″W / 52.975°N 0.533°W / 52.975; -0.533 (Ancaster Valley)      SK986430
 | 
1951
 | 
WT, NCR
 | 
Map [3]
 | 
| Bardney Limewoods
 | 
 Y
 | 
 | 
539.8
 | 
1,333.9
 | 
53°14′49″N 0°17′06″W / 53.247°N 0.285°W / 53.247; -0.285 (Bardney Limewoods, Lincolnshire)      TF145736
 | 
1959
 | 
NNR, NCR,
 | 
Map [4]
 | 
| Baston And Thurlby Fens
 | 
 Y
 | 
 | 
54.6
 | 
134.9
 | 
52°44′10″N 0°20′06″W / 52.736°N 0.335°W / 52.736; -0.335 (Baston And Thurlby Fens)      TF125167
 | 
1968
 | 
WT, NCR, SAC
 | 
Map [5]
 | 
| Belshaw
 | 
 Y
 | 
 | 
0.2
 | 
0.5
 | 
53°32′38″N 0°50′31″W / 53.544°N 0.842°W / 53.544; -0.842 (Belshaw)      SE768059
 | 
1988
 | 
 | 
Map [6]
 | 
| Benniworth Haven Cuttings
 | 
 | 
 Y
 | 
2.4
 | 
5.9
 | 
53°19′26″N 0°09′43″W / 53.324°N 0.162°W / 53.324; -0.162 (Benniworth Haven Cuttings)      TF225824
 | 
1966
 | 
GCR
 | 
Map [7]
 | 
| Bratoft Meadows
 | 
 Y
 | 
 | 
2.3
 | 
5.6
 | 
53°09′07″N 0°13′05″E / 53.152°N 0.218°E / 53.152; 0.218 (Bratoft Meadows)      TF484639
 | 
1968
 | 
WT, NCR
 | 
Map [8]
 | 
| Broughton Alder Wood
 | 
 Y
 | 
 | 
0.8
 | 
2
 | 
53°34′37″N 0°33′07″W / 53.577°N 0.552°W / 53.577; -0.552 (Broughton Alder Wood)      SE960099
 | 
1986
 | 
 | 
Map [9]
 | 
| Broughton Far Wood
 | 
 Y
 | 
 | 
17.8
 | 
44
 | 
53°34′59″N 0°33′04″W / 53.583°N 0.551°W / 53.583; -0.551 (Broughton Far Wood)      SE960106
 | 
1957
 | 
 | 
Map [10]
 | 
| Calceby Marsh
 | 
 Y
 | 
 | 
8.8
 | 
21.8
 | 
53°16′23″N 0°05′38″E / 53.273°N 0.094°E / 53.273; 0.094 (Calceby Marsh)      TF397772
 | 
1970
 | 
WT, NCR
 | 
Map [11]
 | 
| Candlesby Hill Quarry
 | 
 Y
 | 
 | 
1.8
 | 
4.5
 | 
53°11′28″N 0°11′02″E / 53.191°N 0.184°E / 53.191; 0.184 (Candlesby Hill)      TF460682
 | 
1966
 | 
WT
 | 
Map [12]
 | 
| Castle Bytham Quarry
 | 
 | 
 Y
 | 
5.5
 | 
13.6
 | 
52°45′00″N 0°32′10″W / 52.75°N 0.536°W / 52.75; -0.536 (Castle Bytham Quarry)      SK989179
 | 
1981
 | 
GCR
 | 
Map [13]
 | 
| Castlethorpe Tufas
 | 
 | 
 Y
 | 
0.5
 | 
1.3
 | 
53°33′25″N 0°31′30″W / 53.557°N 0.525°W / 53.557; -0.525 (Castlethorpe Tufas)      SE978077
 | 
1989
 | 
GCR
 | 
Map [14]
 | 
| Chapel Point-wolla Bank
 | 
 | 
 Y
 | 
39.7
 | 
98.0
 | 
53°14′31″N 0°20′10″E / 53.242°N 0.336°E / 53.242; 0.336 (Chapel Point-Wolla Bank)      TF560742
 | 
2002
 | 
GCR
 | 
Map [15]
 | 
| Claxby Chalk Pit
 | 
 Y
 | 
 Y
 | 
2.2
 | 
5.5
 | 
53°13′23″N 0°10′12″E / 53.223°N 0.17°E / 53.223; 0.17 (Claxby Chalk Pit)      TF450717
 | 
1968
 | 
GCR, WT
 | 
Map [16]
 | 
| Cleatham Quarry
 | 
 Y
 | 
 | 
5.8
 | 
14.2
 | 
53°30′04″N 0°35′02″W / 53.501°N 0.584°W / 53.501; -0.584 (Cleatham Quarry)      SE940014
 | 
1986
 | 
 | 
Map [17]
 | 
| Cliff Farm Pit
 | 
 | 
 Y
 | 
1.1
 | 
2.8
 | 
53°29′42″N 0°34′59″W / 53.495°N 0.583°W / 53.495; -0.583 (Cliff Farm Pit)      SE941008
 | 
1985
 | 
GCR
 | 
Map [18]
 | 
| Cliff House
 | 
 Y
 | 
 | 
4.8
 | 
11.7
 | 
53°26′46″N 0°32′56″W / 53.446°N 0.549°W / 53.446; -0.549 (Cliff House)      SK965953
 | 
1966
 | 
 | 
Map [19]
 | 
| Copper Hill
 | 
 | 
 Y
 | 
6.6
 | 
16.4
 | 
52°58′19″N 0°32′42″W / 52.972°N 0.545°W / 52.972; -0.545 (Copper Hill)      SK978426
 | 
1950
 | 
GCR
 | 
Map [20]
 | 
| Conesby (Yorkshire East) Quarry
 | 
 | 
 Y
 | 
0.9
 | 
2.2
 | 
53°37′19″N 0°38′10″W / 53.622°N 0.636°W / 53.622; -0.636 (Conesby  (Yorkshire East) Quarry)      SE903148
 | 
1995
 | 
GCR
 | 
Map [21]
 | 
| Cowbit Wash
 | 
 | 
 Y
 | 
9.1
 | 
22.4
 | 
52°45′18″N 0°09′50″W / 52.755°N 0.164°W / 52.755; -0.164 (Cowbit Wash)      TF240191
 | 
1999
 | 
GCR
 | 
Map [22]
 | 
| Cross Drain
 | 
 Y
 | 
 | 
5.7
 | 
14.2
 | 
52°42′32″N 0°17′02″W / 52.709°N 0.284°W / 52.709; -0.284 (Cross Drain)      TF160137
 | 
1991
 | 
 | 
Map [23]
 | 
| Crowle Borrow Pits
 | 
 Y
 | 
 | 
4.9
 | 
12.2
 | 
53°35′10″N 0°48′29″W / 53.586°N 0.808°W / 53.586; -0.808 (Crowle Borrow Pits)      SE790106
 | 
1986
 | 
 | 
Map [24]
 | 
| Dalby Hill
 | 
 | 
 Y
 | 
0.2
 | 
0.5
 | 
53°12′14″N 0°06′25″E / 53.204°N 0.107°E / 53.204; 0.107 (Dalby Hill)      TF408695
 | 
1986
 | 
GCR
 | 
Map [25]
 | 
| Deeping Gravel Pits
 | 
 Y
 | 
 | 
57.6
 | 
142.3
 | 
52°39′32″N 0°15′36″W / 52.659°N 0.26°W / 52.659; -0.26 (Deeping Gravel Pits)      TF178082
 | 
1968
 | 
Wildlife refuge
 | 
Map [26]
 | 
| Doddington Clay Woods
 | 
 Y
 | 
 | 
23.9
 | 
59.0
 | 
53°13′41″N 0°39′07″W / 53.228°N 0.652°W / 53.228; -0.652 (Doddington Clay Woods)      SK901710
 | 
1987
 | 
 | 
Map [27]
 | 
| Dole Wood
 | 
 Y
 | 
 | 
4.0
 | 
9.8
 | 
52°43′55″N 0°23′10″W / 52.732°N 0.386°W / 52.732; -0.386 (Dole Wood)      TF091161
 | 
1968
 | 
WT
 | 
Map [28]
 | 
| Dunsby Wood
 | 
 Y
 | 
 | 
54.6
 | 
134.8
 | 
52°49′12″N 0°23′06″W / 52.82°N 0.385°W / 52.82; -0.385 (Dunsby Wood)      TF089259
 | 
1968
 | 
 | 
Map [29]
 | 
| Eastoft Meadow
 | 
 Y
 | 
 | 
0.8
 | 
2.1
 | 
53°37′05″N 0°48′47″W / 53.618°N 0.813°W / 53.618; -0.813 (Eastoft Meadow)      SE786142
 | 
1985
 | 
 | 
Map [30]
 | 
| Epworth Turbary
 | 
 Y
 | 
 | 
32.9
 | 
81.3
 | 
53°31′34″N 0°51′50″W / 53.526°N 0.864°W / 53.526; -0.864 (Epworth Turbary)      SE754039
 | 
1951
 | 
WT
 | 
Map [31]
 | 
| Fulsby Wood
 | 
 Y
 | 
 | 
109.3
 | 
270.0
 | 
53°08′02″N 0°07′26″W / 53.134°N 0.124°W / 53.134; -0.124 (Fulsby Wood)      TF256613
 | 
1986
 | 
 | 
Map [32]
 | 
| Gibraltar Point
 | 
 Y
 | 
 | 
598.2
 | 
1,478.3
 | 
53°06′11″N 0°19′59″E / 53.103°N 0.333°E / 53.103; 0.333 (Gibraltar Point)      TF563587
 | 
1951
 | 
Bird sanctuary, SPA, GCR, LNR, WT, NNR, NCR, Ramsar site, SAC
 | 
Map [33]
 | 
| Gosling's Corner
 | 
 Y
 | 
 | 
10.2
 | 
25.1
 | 
53°15′43″N 0°17′20″W / 53.262°N 0.289°W / 53.262; -0.289 (Gosling'S Corner)      TF142752
 | 
1988
 | 
 | 
Map [34]
 | 
| Great Casterton Road Banks
 | 
 Y
 | 
 | 
0.4
 | 
1
 | 
52°39′47″N 0°30′54″W / 52.663°N 0.515°W / 52.663; -0.515 (Great Casterton Road Banks)      TF005083
 | 
1959
 | 
WT
 | 
Map [35]
 | 
| Greetwell Hollow Quarry
 | 
 | 
 Y
 | 
59.3
 | 
146.6
 | 
53°14′10″N 0°29′49″W / 53.236°N 0.497°W / 53.236; -0.497 (Greetwell Hollow Quarry)      TF004721
 | 
1951
 | 
GCR
 | 
Map [36]
 | 
| Grimsthorpe Park
 | 
 Y
 | 
 | 
116.4
 | 
287.7
 | 
52°45′47″N 0°29′13″W / 52.763°N 0.487°W / 52.763; -0.487 (Grimsthorpe Park)      TF022194
 | 
1969
 | 
SAC,
 | 
Map [37]
 | 
| Hainton Sheepwalk
 | 
 Y
 | 
 | 
2.5
 | 
6.3
 | 
53°21′32″N 0°13′19″W / 53.359°N 0.222°W / 53.359; -0.222 (Hainton Sheepwalk)      TF184861
 | 
1989
 | 
 | 
Map [38]
 | 
| Harrington Hall Sand Pit
 | 
 | 
 Y
 | 
0.1
 | 
0.2
 | 
53°13′37″N 0°02′13″E / 53.227°N 0.037°E / 53.227; 0.037 (Harrington Hall Sand Pit)      TF361719
 | 
1986
 | 
GCR
 | 
Map [39]
 | 
| Hatfield Chase Ditches
 | 
 Y
 | 
 | 
44.2
 | 
109.2
 | 
53°32′31″N 0°53′17″W / 53.542°N 0.888°W / 53.542; -0.888 (Hatfield Chase Ditches)      SE738056
 | 
1999
 | 
 | 
Map [40]
 | 
| Haxey Grange Fen
 | 
 Y
 | 
 | 
13.3
 | 
32.8
 | 
53°27′58″N 0°53′24″W / 53.466°N 0.89°W / 53.466; -0.89 (Haxey Grange Fen)      SK738972
 | 
1988
 | 
 | 
Map [41]
 | 
| Haxey Turbary
 | 
 Y
 | 
 | 
14.4
 | 
35.6
 | 
53°30′29″N 0°52′26″W / 53.508°N 0.874°W / 53.508; -0.874 (Haxey Turbary)      SE748018
 | 
1951
 | 
WT
 | 
Map [42]
 | 
| Hewson's Field
 | 
 Y
 | 
 | 
0.5
 | 
1.2
 | 
53°29′10″N 0°49′05″W / 53.486°N 0.818°W / 53.486; -0.818 (Hewson'S Field)      SK785995
 | 
1991
 | 
 | 
Map [43]
 | 
| High Barn, Oxcombe
 | 
 Y
 | 
 | 
8.3
 | 
20.4
 | 
53°16′16″N 0°01′16″W / 53.271°N 0.021°W / 53.271; -0.021 (High Barn, Oxcombe)      TF321767
 | 
1966
 | 
 | 
Map [44]
 | 
| High Dyke
 | 
 Y
 | 
 | 
6.8
 | 
16.7
 | 
53°02′28″N 0°31′30″W / 53.041°N 0.525°W / 53.041; -0.525 (High Dyke)      SK990503
 | 
1951
 | 
 | 
Map [45]
 | 
| Holywell Banks
 | 
 Y
 | 
 | 
6.1
 | 
15.1
 | 
52°43′48″N 0°31′44″W / 52.73°N 0.529°W / 52.73; -0.529 (Holywell Banks)      SK994157
 | 
1951
 | 
 | 
Map [46]
 | 
| Honington Camp
 | 
 Y
 | 
 | 
1.4
 | 
3.5
 | 
52°58′12″N 0°34′52″W / 52.97°N 0.581°W / 52.97; -0.581 (Honington Camp)      SK954423
 | 
1968
 | 
SAM
 | 
Map [47]
 | 
| Hoplands Wood
 | 
 Y
 | 
 | 
14.2
 | 
35.0
 | 
53°13′16″N 0°11′02″E / 53.221°N 0.184°E / 53.221; 0.184 (Hoplands Wood)      TF459715
 | 
1966
 | 
WT
 | 
Map [48]
 | 
| Horbling Fen
 | 
 | 
 Y
 | 
15.1
 | 
37.3
 | 
52°54′07″N 0°17′24″W / 52.902°N 0.29°W / 52.902; -0.29 (Horbling Fen)      TF151352
 | 
1999
 | 
GCR
 | 
Map [49]
 | 
| Humber Estuary
 | 
 Y
 | 
 Y
 | 
37,000.6
 | 
91,430.5
 | 
53°34′41″N 0°01′48″E / 53.578°N 0.03°E / 53.578; 0.03 (Humber Estuary)      TA345110
 | 
2004
 | 
SPA, GCR, MOD, NNR, Ramsar site, SAC
 | 
Map [50]
 | 
| Hundleby Clay Pit
 | 
 | 
 Y
 | 
0.8
 | 
1.9
 | 
53°10′23″N 0°03′58″E / 53.173°N 0.066°E / 53.173; 0.066 (Hundleby Clay Pit)      TF382660
 | 
1986
 | 
GCR,
 | 
Map [51]
 | 
| Jenkins Carr
 | 
 Y
 | 
 | 
3.7
 | 
9.1
 | 
53°09′22″N 0°04′23″E / 53.156°N 0.073°E / 53.156; 0.073 (Jenkins Carr)      TF387641
 | 
1966
 | 
 | 
Map [52]
 | 
| Keal Carr
 | 
 Y
 | 
 | 
9.4
 | 
23.1
 | 
53°09′43″N 0°03′58″E / 53.162°N 0.066°E / 53.162; 0.066 (Keal Carr)      TF382648
 | 
1968
 | 
WT
 | 
Map [53]
 | 
| Kingerby Beck Meadows
 | 
 Y
 | 
 | 
5.5
 | 
13.6
 | 
53°25′41″N 0°25′05″W / 53.428°N 0.418°W / 53.428; -0.418 (Kingerby Beck Meadows)      TF052935
 | 
1988
 | 
 | 
Map [54]
 | 
| Kirkby Moor
 | 
 Y
 | 
 | 
73.6
 | 
181.9
 | 
53°08′38″N 0°10′12″W / 53.144°N 0.17°W / 53.144; -0.17 (Kirkby Moor)      TF225623
 | 
1966
 | 
WT,
 | 
Map [55]
 | 
| Kirmington Pits
 | 
 | 
 Y
 | 
9.1
 | 
22.5
 | 
53°35′20″N 0°20′06″W / 53.589°N 0.335°W / 53.589; -0.335 (Kirmington Pits)      TA103116
 | 
1951
 | 
GCR
 | 
Map [56]
 | 
| Kirton Wood, Lincolnshire
 | 
 Y
 | 
 | 
30.3
 | 
74.9
 | 
52°52′55″N 0°32′42″W / 52.882°N 0.545°W / 52.882; -0.545 (Kirton Wood, Lincolnshire)      SK980326
 | 
1968
 | 
NCR
 | 
Map [57]
 | 
| Langtoft Gravel Pits
 | 
 Y
 | 
 | 
28.4
 | 
70.3
 | 
52°41′02″N 0°21′22″W / 52.684°N 0.356°W / 52.684; -0.356 (Langtoft Gravel Pits)      TF112109
 | 
1968
 | 
 | 
Map [58]
 | 
| Laughton Common
 | 
 Y
 | 
 | 
54.7
 | 
135.2
 | 
53°27′36″N 0°44′28″W / 53.46°N 0.741°W / 53.46; -0.741 (Laughton Common)      SK837967
 | 
1999
 | 
 | 
Map [59]
 | 
| Lea Marsh
 | 
 Y
 | 
 | 
27.6
 | 
68.1
 | 
53°22′26″N 0°46′19″W / 53.374°N 0.772°W / 53.374; -0.772 (Lea Marsh)      SK818870
 | 
1998
 | 
 | 
Map [60]
 | 
| Linwood Warren
 | 
 Y
 | 
 | 
25.7
 | 
63.5
 | 
53°22′19″N 0°18′07″W / 53.372°N 0.302°W / 53.372; -0.302 (Linwood Warren)      TF131875
 | 
1966
 | 
WT
 | 
Map [61]
 | 
| Little Scrubbs Meadow
 | 
 Y
 | 
 | 
2.0
 | 
4.9
 | 
53°15′11″N 0°17′02″W / 53.253°N 0.284°W / 53.253; -0.284 (Little Scrubbs Meadow)      TF146743
 | 
1988
 | 
WT
 | 
Map [62]
 | 
| Manton and Twigmoor
 | 
 Y
 | 
 | 
88.9
 | 
219.6
 | 
53°31′34″N 0°34′59″W / 53.526°N 0.583°W / 53.526; -0.583 (Manton and Twigmoor)      SE940042
 | 
1951
 | 
 | 
Map [63]
 | 
| Manton Stone Quarry
 | 
 | 
 Y
 | 
17.5
 | 
43.2
 | 
53°30′36″N 0°35′02″W / 53.51°N 0.584°W / 53.51; -0.584 (Manton Stone Quarry)      SE940024
 | 
1986
 | 
GCR
 | 
Map [64]
 | 
| Math And Elsea Wood
 | 
 Y
 | 
 | 
44.2
 | 
109.3
 | 
52°45′04″N 0°22′34″W / 52.751°N 0.376°W / 52.751; -0.376 (Math And Elsea Wood)      TF097183
 | 
1988
 | 
 | 
Map [65]
 | 
| Mavis Enderby Valley
 | 
 Y
 | 
 | 
15.7
 | 
38.8
 | 
53°10′52″N 0°02′17″E / 53.181°N 0.038°E / 53.181; 0.038 (Mavis Enderby Valley)      TF363668
 | 
1988
 | 
 | 
Map [66]
 | 
| Messingham Heath
 | 
 Y
 | 
 | 
17.8
 | 
43.9
 | 
53°31′08″N 0°40′55″W / 53.519°N 0.682°W / 53.519; -0.682 (Messingham Heath)      SE875033
 | 
1965
 | 
 | 
Map [67]
 | 
| Messingham Sand Quarry
 | 
 Y
 | 
 | 
51.8
 | 
128
 | 
53°31′12″N 0°37′34″W / 53.52°N 0.626°W / 53.52; -0.626 (Messingham Sand Quarry)      SE912035
 | 
1987
 | 
WT
 | 
Map [68]
 | 
| Metheringham Heath Quarry
 | 
 | 
 Y
 | 
12.8
 | 
31.5
 | 
53°08′24″N 0°25′37″W / 53.14°N 0.427°W / 53.14; -0.427 (Metheringham Heath Quarry)      TF053615
 | 
1981
 | 
GCR
 | 
Map [69]
 | 
| Moor Closes
 | 
 Y
 | 
 | 
6.8
 | 
16.8
 | 
52°58′59″N 0°32′31″W / 52.983°N 0.542°W / 52.983; -0.542 (Moor Closes)      SK980438
 | 
1968
 | 
WT, NCR,
 | 
Map [70]
 | 
| Moor Farm
 | 
 Y
 | 
 | 
47.0
 | 
116.1
 | 
53°09′25″N 0°10′30″W / 53.157°N 0.175°W / 53.157; -0.175 (Moor Farm)      TF221638
 | 
1981
 | 
WT
 | 
Map [71]
 | 
| Muckton Wood
 | 
 Y
 | 
 | 
16.7
 | 
41.3
 | 
53°18′32″N 0°04′16″E / 53.309°N 0.071°E / 53.309; 0.071 (Muckton Wood)      TF381811
 | 
1953
 | 
WT
 | 
Map [72]
 | 
| Nettleton Chalk Pit
 | 
 | 
 Y
 | 
8.1
 | 
20.0
 | 
53°28′05″N 0°18′25″W / 53.468°N 0.307°W / 53.468; -0.307 (Nettleton Chalk Pit)      TF125981
 | 
1968
 | 
GCR
 | 
Map [73]
 | 
| New England Valley
 | 
 Y
 | 
 | 
6.3
 | 
15.7
 | 
53°14′31″N 0°00′04″E / 53.242°N 0.001°E / 53.242; 0.001 (New England Valley)      TF336735
 | 
1966
 | 
 | 
Map [74]
 | 
| Normanby Meadow
 | 
 Y
 | 
 | 
4.2
 | 
10.3
 | 
53°23′28″N 0°27′32″W / 53.391°N 0.459°W / 53.391; -0.459 (Normanby Meadow)      TF026893
 | 
2002
 | 
 | 
Map [75]
 | 
| North Killingholme Haven Pits
 | 
 Y
 | 
 | 
21.6
 | 
53.4
 | 
53°39′40″N 0°14′13″W / 53.661°N 0.237°W / 53.661; -0.237 (North Killingholme Haven Pits)      TA166197
 | 
1996
 | 
WT, SPA
 | 
Map [76]
 | 
| Porter's Lodge Meadows
 | 
 Y
 | 
 | 
9.6
 | 
23.8
 | 
52°45′54″N 0°34′37″W / 52.765°N 0.577°W / 52.765; -0.577 (Porter'S Lodge Meadows)      SK961196
 | 
1988
 | 
 | 
Map [77]
 | 
| Potterhanworth Wood
 | 
 Y
 | 
 | 
33.1
 | 
81.7
 | 
53°11′17″N 0°23′49″W / 53.188°N 0.397°W / 53.188; -0.397 (Potterhanworth Wood)      TF072668
 | 
1968
 | 
Forest nature reserve, NCR
 | 
Map [78]
 | 
| Red Hill
 | 
 Y
 | 
 | 
3.0
 | 
7.5
 | 
53°18′29″N 0°06′14″W / 53.308°N 0.104°W / 53.308; -0.104 (Red Hill)      TF264807
 | 
1951
 | 
LNR, WT,
 | 
Map [79]
 | 
| Robert's Field
 | 
 Y
 | 
 | 
3.0
 | 
7.5
 | 
52°43′23″N 0°31′15″W / 52.723°N 0.5208°W / 52.723; -0.5208 (Robert's Field)      TF000150
 | 
 | 
LNR, WT,
 | 
[80]
 | 
| Risby Warren
 | 
 Y
 | 
 Y
 | 
157.1
 | 
388.2
 | 
53°36′36″N 0°36′32″W / 53.61°N 0.609°W / 53.61; -0.609 (Risby Warren)      SE921135
 | 
1966
 | 
GCR, NCR,
 | 
Map [81]
 | 
| Rush Furlong
 | 
 Y
 | 
 | 
0.5
 | 
1.2
 | 
53°29′42″N 0°49′34″W / 53.495°N 0.826°W / 53.495; -0.826 (Rush Furlong)      SE780004
 | 
1985
 | 
WT
 | 
Map [82]
 | 
| Ryhall Pasture and Little Warren Verges
 | 
 Y
 | 
 | 
6.2
 | 
15.4
 | 
52°42′43″N 0°29′42″W / 52.712°N 0.495°W / 52.712; -0.495 (Ryhall Pasture And Little Warren Verges)      TF018138
 | 
1983
 | 
 | 
Map [83]
 | 
| Saltfleetby-Theddlethorpe Dunes National Nature Reserve
 | 
 Y
 | 
 | 
971.9
 | 
2,401.5
 | 
53°23′56″N 0°13′30″E / 53.399°N 0.225°E / 53.399; 0.225 (Saltfleetby - Theddlethorpe Dunes)      TF480914
 | 
1951
 | 
NNR, NCR, SAC
 | 
Map [84]
 | 
| Sapperton & Pickworth Woods
 | 
 Y
 | 
 | 
28.1
 | 
69.3
 | 
52°53′42″N 0°28′19″W / 52.895°N 0.472°W / 52.895; -0.472 (Sapperton & Pickworth Woods)      TF029342
 | 
1968
 | 
 | 
Map [85]
 | 
| Scotton And Laughton Forest Ponds
 | 
 Y
 | 
 | 
48.3
 | 
119.4
 | 
53°28′59″N 0°42′22″W / 53.483°N 0.706°W / 53.483; -0.706 (Scotton And Laughton Forest Ponds)      SK860992
 | 
1959
 | 
 | 
Map [86]
 | 
| Scotton Beck Fields
 | 
 Y
 | 
 | 
16.8
 | 
41.4
 | 
53°28′44″N 0°40′55″W / 53.479°N 0.682°W / 53.479; -0.682 (Scotton Beck Fields)      SK876988
 | 
1987
 | 
 | 
Map [87]
 | 
| Scotton Common
 | 
 Y
 | 
 | 
15.1
 | 
37.3
 | 
53°28′30″N 0°41′31″W / 53.475°N 0.692°W / 53.475; -0.692 (Scotton Common)      SK869984
 | 
1951
 | 
WT,
 | 
Map [88]
 | 
| Sea Bank Clay Pits
 | 
 Y
 | 
 | 
16.6
 | 
40.9
 | 
53°17′17″N 0°17′49″E / 53.288°N 0.297°E / 53.288; 0.297 (Sea Bank Clay Pits)      TF532792
 | 
1959
 | 
WT,
 | 
Map [89]
 | 
| Silverines Meadows
 | 
 Y
 | 
 | 
6.2
 | 
15.3
 | 
53°17′28″N 0°06′40″W / 53.291°N 0.111°W / 53.291; -0.111 (Silverines Meadows)      TF260788
 | 
1959
 | 
WT
 | 
Map [90]
 | 
| Skendleby Psalter Banks
 | 
 Y
 | 
 | 
0.9
 | 
2.2
 | 
53°13′19″N 0°09′18″E / 53.222°N 0.155°E / 53.222; 0.155 (Skendleby Psalter Banks)      TF440716
 | 
1966
 | 
WT
 | 
Map [91]
 | 
| Sotby Meadows
 | 
 Y
 | 
 | 
7.2
 | 
17.8
 | 
53°17′02″N 0°11′49″W / 53.284°N 0.197°W / 53.284; -0.197 (Sotby Meadows)      TF203779
 | 
1981
 | 
WT
 | 
Map [92]
 | 
| South Ferriby Chalk Pit
 | 
 | 
 Y
 | 
85
 | 
209.9
 | 
53°40′01″N 0°29′10″W / 53.667°N 0.486°W / 53.667; -0.486 (South Ferriby Chalk Pit)      TA001200
 | 
1987
 | 
GCR
 | 
Map [93]
 | 
| Surfleet Lows
 | 
 Y
 | 
 | 
3.4
 | 
8.5
 | 
52°50′24″N 0°08′38″W / 52.84°N 0.144°W / 52.84; -0.144 (Surfleet Lows)      TF251286
 | 
1968
 | 
WT
 | 
Map [94]
 | 
| Swaby Valley
 | 
 Y
 | 
 | 
3.4
 | 
8.4
 | 
53°16′37″N 0°05′06″E / 53.277°N 0.085°E / 53.277; 0.085 (Swaby Valley)      TF391776
 | 
1966
 | 
WT
 | 
Map [95]
 | 
| Swallow Wold
 | 
 Y
 | 
 | 
4.3
 | 
10.6
 | 
53°31′37″N 0°14′24″W / 53.527°N 0.24°W / 53.527; -0.24 (Swallow Wold)      TA168048
 | 
1966
 | 
 | 
Map [96]
 | 
| Swanholme Lakes
 | 
 Y
 | 
 | 
53.1
 | 
131.3
 | 
53°12′18″N 0°35′24″W / 53.205°N 0.59°W / 53.205; -0.59 (Swanholme Lakes)      SK943685
 | 
1985
 | 
LNR, NCR
 | 
Map [97]
 | 
| Swinstead Valley
 | 
 Y
 | 
 | 
8.9
 | 
22.0
 | 
52°47′N 0°31′W / 52.79°N 0.51°W / 52.79; -0.51 (Swinstead Valley)      TF006224
 | 
1989
 | 
 | 
Map [98]
 | 
| Tattershall Carrs
 | 
 Y
 | 
 | 
26.6
 | 
65.7
 | 
53°06′47″N 0°11′06″W / 53.113°N 0.185°W / 53.113; -0.185 (Tattershall Carrs)      TF216589
 | 
1968
 | 
 | 
Map [99]
 | 
| Tattershall Old Gravel Pits
 | 
 Y
 | 
 | 
14.5
 | 
35.9
 | 
53°07′08″N 0°12′47″W / 53.119°N 0.213°W / 53.119; -0.213 (Tattershall Old Gravel Pits)      TF197595
 | 
1951
 | 
 | 
Map [100]
 | 
| Tetford Wood
 | 
 Y
 | 
 | 
5.4
 | 
13.3
 | 
53°15′47″N 0°00′25″W / 53.263°N 0.007°W / 53.263; -0.007 (Tetford Wood)      TF330758
 | 
1951
 | 
 | 
Map [101]
 | 
| Tetney Blow Wells
 | 
 Y
 | 
 | 
14.7
 | 
36.4
 | 
53°29′10″N 0°00′43″W / 53.486°N 0.012°W / 53.486; -0.012 (Tetney Blow Wells)      TA320006
 | 
1968
 | 
WT
 | 
Map [102]
 | 
| The Hermitage
 | 
 Y
 | 
 | 
4.4
 | 
10.9
 | 
52°49′37″N 0°30′14″W / 52.827°N 0.504°W / 52.827; -0.504 (The Hermitage)      TF009265
 | 
1968
 | 
SAM,
 | 
Map [103]
 | 
| The Wash
 | 
 Y
 | 
 | 
62,045.8
 | 
153,318.5
 | 
52°56′28″N 0°15′11″E / 52.941°N 0.253°E / 52.941; 0.253 (The Wash)      TF515405
 | 
1972
 | 
SPA, WT, NNR, NCR, Ramsar site, RSPB
 | 
Map [104]
 | 
| Thorne Crowle and Goole Moors
 | 
 Y
 | 
 | 
1919
 | 
4742.1
 | 
53°37′59″N 0°54′04″W / 53.633°N 0.901°W / 53.633; -0.901 (Thorne Crowle and Goole Moors)      SE728157
 | 
1970
 | 
SPA, WT, NNR, NCR, Ramsar site, SAC
 | 
Map [105]
 | 
| Tortoiseshell Wood
 | 
 Y
 | 
 | 
9.3
 | 
22.9
 | 
52°46′05″N 0°34′34″W / 52.768°N 0.576°W / 52.768; -0.576 (Tortoiseshell Wood)      SK962199
 | 
1987
 | 
WT, NCR
 | 
Map [106]
 | 
| Troy Wood
 | 
 Y
 | 
 | 
91.1
 | 
225.1
 | 
53°06′43″N 0°08′17″W / 53.112°N 0.138°W / 53.112; -0.138 (Troy Wood)      TF247588
 | 
1951
 | 
 | 
Map [107]
 | 
| Tuetoes Hills
 | 
 Y
 | 
 | 
12.5
 | 
30.8
 | 
53°30′11″N 0°43′44″W / 53.503°N 0.729°W / 53.503; -0.729 (Tuetoes Hills)      SE844014
 | 
1999
 | 
 | 
Map [108]
 | 
| Welton-le-wold Old Gravel Pits
 | 
 | 
 Y
 | 
3.4
 | 
8.4
 | 
53°22′37″N 0°04′37″W / 53.377°N 0.077°W / 53.377; -0.077 (Welton-Le-Wold Old Gravel Pits)      TF280884
 | 
1986
 | 
GCR
 | 
Map [109]
 | 
| Wickenby Wood
 | 
 Y
 | 
 | 
43.6
 | 
107.6
 | 
53°19′48″N 0°22′52″W / 53.33°N 0.381°W / 53.33; -0.381 (Wickenby Wood)      TF079827
 | 
1976
 | 
Forest nature reserve, NCR
 | 
Map [110]
 | 
| Willoughby Meadow
 | 
 Y
 | 
 | 
0.5
 | 
1.3
 | 
53°13′01″N 0°12′11″E / 53.217°N 0.203°E / 53.217; 0.203 (Willoughby Meadow)      TF472712
 | 
1968
 | 
WT
 | 
Map [111]
 | 
| Willoughby Wood
 | 
 Y
 | 
 | 
23.2
 | 
57.4
 | 
53°12′47″N 0°11′10″E / 53.213°N 0.186°E / 53.213; 0.186 (Willoughby Wood)      TF461707
 | 
1951
 | 
 | 
Map [112]
 | 
| Wilsford & Rauceby Warrens
 | 
 Y
 | 
 | 
57.4
 | 
141.9
 | 
52°58′44″N 0°28′01″W / 52.979°N 0.467°W / 52.979; -0.467 (Wilsford & Rauceby Warrens)      TF030435
 | 
1968
 | 
WT
 | 
Map [113]
 | 
| Wilsford Heath Quarry
 | 
 Y
 | 
 | 
16.2
 | 
40.0
 | 
52°57′36″N 0°32′02″W / 52.96°N 0.534°W / 52.96; -0.534 (Wilsford Heath Quarry)      SK986413
 | 
1968
 | 
 | 
Map [114]
 | 
| Winceby Rectory Pit
 | 
 | 
 Y
 | 
<0.1
 | 
0.1
 | 
53°11′49″N 0°01′30″W / 53.197°N 0.025°W / 53.197; -0.025 (Winceby Rectory Pit)      TF320685
 | 
1987
 | 
GCR
 | 
Map [115]
 | 
| Withcall And South Willingham Tunnels
 | 
 Y
 | 
 | 
3.8
 | 
9.4
 | 
53°19′41″N 0°10′48″W / 53.328°N 0.18°W / 53.328; -0.18 (Withcall And South Willingham Tunnels)      TF213828
 | 
2002
 | 
 | 
Map [116]
 | 
| Woodhall Spa Golf Course
 | 
 Y
 | 
 | 
55.0
 | 
135.8
 | 
53°09′43″N 0°11′31″W / 53.162°N 0.192°W / 53.162; -0.192 (Woodhall Spa Golf Course)      TF210643
 | 
1969
 | 
 | 
Map [117]
 | 
| Woodnook Valley
 | 
 Y
 | 
 | 
9.7
 | 
23.8
 | 
52°52′48″N 0°36′43″W / 52.88°N 0.612°W / 52.88; -0.612 (Woodnook Valley)      SK935323
 | 
1968
 | 
 | 
Map [118]
 | 
| Wrawby Moor
 | 
 Y
 | 
 | 
18.5
 | 
45.6
 | 
53°35′06″N 0°26′38″W / 53.585°N 0.444°W / 53.585; -0.444 (Wrawby Moor)      TA031109
 | 
1966
 | 
 | 
Map [119]
 |