Southwest of Carbondale, the Sunlight To Powderhorn Trail (aka S-P Trail or SP Trail) is 90 mile snowmobile route from west of Carbondale to east of Grand Junction. Essentially, it runs from near Sunlight ski area to near Powderhorn ski area. The main trail is marked with green reflectors. Along the way, there are about 180 miles of side trails.
The trail system elevation ranges from 8,000 to 10,500 feet.
There are 2 access points to this route around the Glenwood Springs area: 1) the Fourmile Trailhead is accessed from Glenwood Springs via the Fourmile road. Follow the signs to Sunlight Ski Area. Before reaching the ski area, turn right onto a gravel road marked FDR #300. Travel 2 1/2 miles farther to the parking area on the righ. 2) The Marion Gulch Trailhead is accessed from Carbondale. Turn West off Hwy. 133 at the Main Street traffic light. Continue on this road which turns into County Road 108 after the bridge near Colorado Rocky Mountain School. Continue past the bridge for approximately 6 miles. At County Road 123 turn right and continue up this road for about 1 mile to the trailhead.
Note: Fuel may be available at the Electric Mountain Lodge, which is 3 miles off the main trail on side trail #50.
All snowmobiles operating on federal lands within Colorado are required to be registered with Colorado State Parks. This registration permit is available at most National Forest ranger offices and at some chamber of commerce offices. It is highly recommended to purchase the $3 annual Colorado Search And Rescue Card (CORSAR) prior to snowmobiling to help reimburse local search teams should they be needed.
Overall, Sunlight To Powderhorn Trail is the 11th most popular snowmobile trail of all 24 snowmobiling rides in Colorado.