Gateway Road goes up to the jeep trail on BLM land. This can be ridden in a loop.
Park at the junction of Snowmass Creek Rd. and Capital Creek Rd. Make your way to and up the Gateway Rd. then to the Light Hill Rd. to access the BLM Jeep trail. The descent is rough, steep and full of baby-head rocks with one or two hike-a-bike sections.
Can't beat the views.