-trail #13 can be done from either Boulder pass or Sherman Pass
-from Boulder--drive to Curlew,Washington.Turn left at Curlew,cross the bridge and follow Road #61 to the pass.
-park at the Trailhead parking area on the right.
-stay on the trail #13 to Sherman pass
-from Sherman--drive Republic,Washington,turn left on Hwy.20
-follow Hwy.20 to the trailhead at Sherman pass
-turn left at the pass and drive into the trailhead and park
-ride back up the road about 100 yards and look for the trail on the right
-follow trail #13 to Boulder summit
this could possibly be the best 30 miles of mountain bike trails you have ever ridden .
Trail #13 requires a shuttle.