Do you like switchbacks? This trail starts near the Krassel Guard station and climbs steeply up to Krassel Knob. The climb up to the knob has so many switchbacks that you'll loose count as you go back and forth again and again. The switchbacks will demand some good handling skills and a strong rider to manage, otherwise you'll be doing a lot of pushing. Pushing is not all that bad though, since you'll get some amazing views. The switchbacks on this trail have a similar feel to the Boundary Creek Trail outside of Stanley with a very similar elevation gain. So if you have conquered that trail then this one is worth the trip.
Once at the top of the Knob you'll have a choice to turn right onto Six Mile Ridge North Segment or left onto the Six Mile Ridge South Segment or just continue straight. The trail will descend and connect into the Buckhorn drainages to create a nice loop. The downhill is now a series of long roller coasters, with some short ups and long downhills. You'll hit some loose sections, but the trail is fun as it descends into the Buckhorn drainages.
The trail ends at the West Fork of the Buckhorn. From here you'll have three options depending on how long you want to ride. You can turn around, and head back the way you came, or head either east or west.