from usfs.gov:
The Rock Creek trail is 11.6 miles long. It begins at Road 550b and ends at Idaho State Line. This is an easy trail for stock, mountain bikers and hikers. Trail #580 joins with Trail #502 at the west end of Lake Como. On this trail you may see wildlife and osprey. Just beyond the trail junction of #502 you will be rewarded by a beautiful waterfall. The Selway Bitterroot Wilderness boundary is located approximately 1/2 mile beyond the lake. The trail is open for the following uses: Hiking, Mountain Biking and Horseback Riding. Mountain biking is not allowed in the Selway Bitterroot Wilderness.