Grand Mesa, Uncompahgre, and Gunnison (GMUG) National Forest encompasses over 3 million acres of rugged canyons and mountain country in western Colorado. Covering over 500 miles, Grand Mesa is a distinctive land formation with its flat top and towering cliffs. It's the largest flat-top mountain in the world and home to abundant wildlife. Because of the flatness, the region contains a dense concentration of lakes and ponds full of fish. While traveling up Trail 121, you'll pass numerous lakes with free primitive camping along the shore. Other campsites are nestled back in the dense aspen and pine trees. The route is a well-maintained gravel and dirt road that can be completed in 2WD. The climb up from the north can have deep washboards and slow-moving traffic. Entering from the south at the ranger station is residential with a 10 mph speed limit.