Grail Falls is a large waterfall flowing along Moses Creek in the Walls of Jerusalem National Park, Tasmania.

It sits just south of Chapter Lake (also known as Chalice Lake), set within a rugged alpine landscape that rewards hiking enthusiasts willing to put in the effort.

Reaching the falls typically involves a multi-hour trek beginning near the end of Mersey Forest Road, south of Lake Rowallan.

The approach follows Moses Creek uphill past other notable cascades before arriving at Grail Falls, with the full circuit covering roughly 8–10 kilometres of moderate terrain and significant elevation gain.

Late spring is considered a particularly good time to visit, when water levels tend to be at their best.