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 ride 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 by foot into the network of trails within the Gospel Hump Wilderness, where biking is not permitted.
Frank Brown Tr. #401 is maintained from the Gilmore Ranch and up 7.5 miles to Sourdough Peak. At Sourdough Peak, you can explore the old lookout and take the Driveway Trail #431 down to Trail #407 to make a loop or continue out to the Moores Sourdough Trail #312 and into the network of trails within the Gospel Hump Wilderness for a riding adventure.