Miller Rock 4x4 Trail is a 7.1 mile moderately trafficked out and back trail located near Lyons, Colorado that features beautiful wild flowers and is rated as difficult. The trail offers a number of activity options and is best used from March until October. Dogs are also able to use this trail.
off road driving
Mix of easy and difficult terrain. Popular hiking area. Lesser used area is entirely land locked by private property except where forest road enters between houses. Fun, challenging terrain. Great views from top of Miller Rock. Popular hiking area. Good for unlicensed vehicles except no place to park at start. Drive in 0.1 miles to small spot. Trail is open all year, weather permitting. You can exit through private Glacier View Ranch on 252A, but you must call ahead a few days to arrange to have them unlock gate. They are friendly to 4-wheelers and do this as a courtesy. Located in Roosevelt National Forest. For current conditions call Boulder Ranger District (303) 541-2500. Steep, rocky climb to enter. Tight trees, but no difficult spots on 523. Choice of moderate or difficult route to Miller Rock. South of Point #3 is steep and very narrow with intimidating ledge near bottom.
Weather was great! some steep incline to the lookout point, but worth it!
Had a little trouble locating the trail as it seems like it is someone's driveway. If you follow the directions this app will give you, turn into the little group of houses that it ends you at and keep following the middle path, this is the trailhead. Trail was fairly narrow in the beginning for my fj cruiser but I made it just fine. Any vehicles wider than an fj would have scratches down the side. Trail opens up after the first bit. The first bit was a great ride but I had to give up since the trail got too hard for my fj (I have a 2.5 inch lift, mud tires, an aftermarket bumper, and aftermarket suspension). I'm sure if you had the guts and a good guide telling you where to place your tires you would be fine. The trail is overall beautiful, well kept, and a fun ride.