Whether hoping to spot a large raptor in search of prey or a gorgeous view of the Continental Divide, look no further than Rabbit Mountain. Located between Lyons and Longmont, the rich cultural and natural history of Rabbit Mountain is easily accessible to bikers, hikers, and equestrians.
From Boulder, CO. go north on Highway 36 to Lyons, there will be a light here and you can only go left or right, go right(East) on Highway 66 for about 1 mile. Turn left on 53rd street, there should be a sign here for Rabbit Mountain open space. go almost 3 miles and you will see the parking lot on the right.
http://www.tripleblaze.com/trail.php?c=3&i=427