Blaen Hafren Falls is a waterfall on the upper River Severn (Afon Hafren) within Hafren Forest in Mid Wales, near Llanidloes. The river rushes over exposed rock in a woodland setting, making it the centrepiece of the dedicated Blaen Hafren Falls Trail.

The trail covering approximately 6 kilometres is rated moderate and takes around 1. 5 hours to complete.

It begins at the Rhyd-y-benwch car park, follows a well-maintained path and riverside boardwalk through mature forest, then climbs via a steeper, rocky-surfaced section with a wooden handrail to reach the falls.

A picnic table sits beside the waterfall, and the route loops back to the start via a forest road.