This is the direction I started to ride - The guide books describe the trail the other direction. From County 129, climb up the gravel/dirt road. There are 2 gates arcoss the road (re-chain the gates). Continue climbing up the road - several switchbacks. This was as far as I made it. The books say the a moderate ride. But a litttle too much for me as a "flatlander".
From downtown Steamboat Springs, take US-40 west about 1.8 miles to Routt County 129, turn right (north) towards Steamboat Lake. A little past Mad Creek, park in the trailhead lot. The trail is back south along the left side of the road.
http://www.singletracks.com/item.php?c=1&i=1749