Well, see here...what you do is...have breakfast at the Gateway and then turn left out of the parking lot.

Seriously:
Gateway Restaurant - If you're a tourist on the way to Spruce Knob National Recreation Area or a local in search of good country cooking, make it a point to try the food at the Gateway Restaurant, conveniently located on Route 33, two miles south of Riverton at the turnoff for Spruce Knob.
(This is the paved route.)