Follow Lava Creek and the Gardner River. Along the way, you can see Undine Falls (60 feet / 18 m) and the confluence of Lava Creek with Gardner River. Near the west end of the trail, a footbridge crosses the Gardner River.
Safety notes: Return by the same route (another 4.2 miles), or have a vehicle shuttle arranged.
Trailheads: Across road from Lava Creek picnic area or across road from Mammoth Campground.