The south end of the trail is nearly impassable. The banks have washed out and covered the trail with loose scree. The only remnant of the trail is a 6 inch wide single track with a severe drop off to the river bed. We are reasonably accomplished mountain bikers but only made it 2 miles up the trail before turning around. "Mountain Biking Norther California's Best 100 Trails" by Fragnoli and Stuart listed the trail as "Easy". I guess that was a few high water years ago.