Yellowstone National Park · Idaho, Montana, Wyoming

South Boundary Trail: Bechler RS-Grassy Lake Road

6.8 mi of trail, end to end · about 700 ft of climbing · 6,177 ft–6,535 ft · earth surface · trail class Minimally Developed · hiking

Ranger stations

6,223 ft 6,444 ft · 3.8 mi high 6,528 ft

Along the way Bechler Ranger Station

Trailhead Cave Falls Trailhead 6,228 ft Drive there

On the parks map

Other trails from the Cave Falls Trailhead

All 473 trails in Yellowstone National ParkFind a trailOn the parks mapPark on nps.gov

About this trail's facts

The lines are the National Park Service's public trails layer, the trailheads and the waterfalls, views, peaks and historic places along them the Service's public points of interest, read 2026-10-16 and simplified for the map; the length is the line's, end to end. The write-ups are the Service's own "things to do" text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the park's own site before you go.