Popular and challenging 4-wheel-drive route with lots of history. We’ve driven this trail many times over the past 20 years, and each time trail conditions were different. On our last drive, we even found a newly routed section through a challenging rocky creek around active mining. non-street-legal vehicles are allowed on roads inside Prescott National Forest. You should be street legal to ride on Cow Creek Road, but we saw several ATVs that were not. Fines are possible.