U M Pass Professional Review and Guide
"The U M Pass loop ventures up one meadow-filled valley and then down another. In between, however, you cross U M Pass and descend an old doubletrack-turned-singletrack loaded with air-worthy earthen berms, a.k.a. whoop-te-doos. Your bike will buck like a bronco, trying to toss you from its saddle. But hold on tight and wait for the horn to blow before you bail. In addition to the exciting descent, the U M Pass tour overflows with scenic charm. Both the Sevenmile Creek and U M Creek Valleys, on either side of the pass, are wide plains, threaded by a meandering creek.
The Sevenmile Cirques along with Mounts Terrill and Marvine neatly package the Sevenmile Creek Valley with glacial accents. The U M Plateau and Windstorm Peak flank U M Valley with subtler forms. Along the loop’s last leg, Johnson Valley Reservoir reflects its aspen-rimmed shore and the elevated plateau tops. Tread: 13 miles of variably rutted and washboard doubletrack, 3 miles of doubletrack turned singletrack, and 3 miles of pavement."