Y Lliwedd is a mountain, connected to Snowdon in the Snowdonia National Park, North Wales.

The eastern flanks are steep cliffs rising above Glaslyn and Llyn Llydaw.

Y Lliwedd is the most conspicuous of the peaks for those who approach Snowdon via the Miners' and Pyg tracks.

Hikers and mountaineers often pass over Y Lliwedd when walking the Snowdon Horseshoe.

The noted British climber George Mallory undertook many of his early climbs here.