It starts off by giving you the choice of beginning with a steep climb on single track or a weak climb on a dirt road. After a half mile it forks. Go left and take the little thompson trail or go right to the loop. If you go right expect a moderately steep rocky climb to the loop. take the loop to the right and the down hill is better.
How to get there:
from denver take I-25 north to hwy 66. take 66 thruogh longmont almost to lyons. rabbit mountain sign on right.