There's a couple of places to park on the east side of the road. As you're leaving the park, the first one is next to a somewhat open area; easier to get back into the area a ways. The second one, I think the one James is talking about, is at Dawson Creek (usually dry); I've never gone in there as it looks pretty rough. If you go in the first one, and head north you'll eventually have to cross Dawson Creek but the drainage is shallower and less of a scramble. Should be possible to skirt the east flank of Maverick Mountain all the way to Indian Head, or pick up Rough Run Creek and head east all the way to Slickrock.

Erosion along Dawson Creek.