If you're looking for a 4-wheeler trail with a moderate to difficult degree of challenge, try out San Luis Pass to Sprint Creek Pass. From June to mid-October you can ride your 4-wheeler through 14.5 miles of scenic territory near Rio Grande National Forest. Since this area falls under park management, you'll need to get a permit to operate your 4-wheeler and have it displayed where it can easily be seen. As always, mufflers and spark arrestors must be in good working order, so check them before you begin the 4-wheeler trail.
Travelling the Continental Divide on your 4-wheeler takes you from the San Luis Pass to Spring Creek Pass trail. Portions of this 4-wheeler trail have been relocated and developed. The Colorado Trail markers have been erected which should make it easier to follow the Continental Divide 4-wheeler Trail, as well as the Colorado 4-wheeler Trail. This challenging 4-wheeler trail begins at an elevation of 11,930 feet and ends at 10,898 feet.
4-wheeler enthusiasts should take Highway 149 to Creede, Colorado. Once you're in Creede, head north on the town's main street. At the north edge of town, you'll find yourself heading into a dramatic, steep-walled, narrow canyon. A 1/2 mile beyond Creede, keep heading straight on Forest Development Road 503 and follow the fork to your right. Your 4-wheeler will need a good first gear and ground clearance for these extremely steep roads. Follow FDR 503 about 6 1/2 miles to the end of the dirt road at the entrance to the Equity Mine. There's a small parking area for 2WD vehicles. Take your 4-wheeler and follow FDR 503 north up the valley for another 1.6 miles, until it bears to the left (west) and climbs steeply over the high ridge.
You and your 4-wheeler will find yourselves welcomed at the campground near Miner's Creek after a long day of 4-wheeling fun.