Puck's Glen is a river-formed ravine on the Cowal peninsula in Argyll and Bute, Scotland, with a popular scenic walking trail beside the Eas Mòr stream . It comes under the Forestry Commission which highlights it as a feature of the Argyll Forest Park (itself within the Loch Lomond and The Trossachs National Park), and describes it as "One of the most magical forests in Scotland, with a delightful trail along a rocky gorge."
The stream tumbles down a series of waterfalls and rapids, joining the River Eachaig about 1.2km south of the entrance to the Benmore Botanic Garden. A car park off the A815 road (about 10km from Dunoon on the road to Loch Eck) gives access by a track to the foot of the glen path, as well as forest paths giving an alternative route to the top of the glen.