“Climb to Jubilee Lake's rope swing and then zip back to your car.”
An often overlooked ride on narrow singletrack. You'll put in some time pedaling up to rope swing intermission before racing back down to the start for a tidy 10-mile, out-and-back ride.
The start of this trail is found a few hundred feet north of Looking Glass Road (FSR #63) on a closed gravel road (shuttles are possible along this road).
The entrance of the trail is on the left, but it may be a little overgrown. From there, the trail is hard to miss. The singletrack starts off with a few steep climbs and gradually levels out into a gradual climb through dense forest on the edge of a slump (the sink the trail is named for).
The trail appears to come to an end in a clearing with no real markings, but some USFS maps show it continuing west on a doubletrack to reach Looking Glass Road (FSR #63) again. If you were to continue straight at the clearing (as mapped) the receding FSR #35 and then the Jubilee Lake Connector
lead to the pedestrian-only Jubilee Lake Trail #3230 on the southern end of water. While riding isn't allowed, you'll come out very near a popular rope swing so dismount and have a go!
On the way back, the ride is fast and flowy as it follows the smooth and narrow singletrack back to the start.