Proxy Falls, Double-tiered waterfall in Willamette National Forest, Oregon, US.

Proxy Falls is a plunge waterfall on Proxy Creek in the Willamette National Forest, Oregon, dropping 226 feet (69 m) from a glacier-cut cliff at the end of a hanging valley. It is also called Lower Proxy Falls; Upper Proxy Falls lies nearby. The water lands in a canyon and sinks into porous subsoil, leaving no surface outlet.

Proxy Falls formed at the end of a hanging valley cut by glaciers about 6,000 years ago. Lava flows from cinder cones near North Sister later filled the valley floor, leaving the falls and neighbouring Upper Proxy Falls dropping off glacier-cut cliffs.

The loop trail starts at a trailhead off Highway 242 and runs 1.6 miles past lava fields and dense conifer forest, with viewpoints toward Proxy Falls and the smaller Upper Proxy Falls. Walking counterclockwise leads first to Proxy Falls; the opposite direction leads to Upper Proxy Falls. Reaching the base of Proxy Falls means leaving the main trail and crossing Proxy River.

A loop trail from Highway 242 takes about an hour to walk and passes through lava fields and forest with several viewing areas along the way. The path is accessible year-round, though it can be slippery during winter months.

Proxy Falls drops 226 feet (69 m) from a hanging valley cut by glaciers about 6,000 years ago. The plunge pool sits on porous subsoil, so the water sinks underground and no surface outlet is visible. The trail to the base leaves the main loop and requires crossing Proxy River.