The trailhead is accessible via Johns Creek pack bridge on Hwy 14. This is a fairly strenuous trail that climbs up toward Sourdough Peak. Its location can be found at H-9 on the Nez Perce Map.
Begin your run on Trail #478 to access #401 for ascent up Sourdough Peak. Trail #478 begins about 0.05 miles from Johns Creek Trailhead on Trail #407. Once at Sourdough Peak, you can explore the old lookout and take the Driveway Trail #431 west to Snoose Creek, Trail #407 to make a loop back to Johns Creek Trailhead, or continue on into the network of trails within the Gospel Hump Wilderness.