Tyrrau Mawr
| Tyrrau Mawr\Craig-las | |
|---|---|
 Tyrrau Mawr from the west | |
| Highest point | |
| Elevation | 661 m (2,169 ft) |
| Prominence | 103 m (338 ft) |
| Parent peak | Cadair Idris |
| Listing | Hewitt, Nuttall, HuMP |
| Naming | |
| Language of name | Welsh |
| Geography | |
| Location | Gwynedd, Wales |
| Parent range | Cadair Idris |
| OS grid | SH711130 |
| Topo map | OS Landranger 124, Explorer OL23 |
| Climbing | |
| Easiest route | Hike |
Tyrrau Mawr or Craig-las is a subsidiary summit of Cadair Idris in the Snowdonia National Park, in Gwynedd, northwest Wales. It lies to the west of Cyfrwy, and can be climbed by taking a west bearing from the Pony Path at Rhiw Gwredydd. Its north face is a crag, known as Craig-las. Below the crags lies Llyn Cregennen with its small island. The reflection of Craig-las from this lake is one of the famous images associated with Snowdonia.
The summit is grassy and marked by a few stones. To the east of the summit lies the large ancient cairn, Carnedd Lwyd. It is often climbed in combination with Craig-y-llyn.[1]