Blue Mesa Reservoir is the largest body of water entirely in Colorado. Created by Blue Mesa Dam, the lake is 20 miles long, has 96 miles of shoreline. Blue Mesa Reservoir offers many types of water activities including boating, sailing, fishing, wind surfing, water skiing and ice fishing in the water. There are two full service marinas, a restaurant and visitor center for area information.
Other activities that are not water-based are hunting, ATV-riding, hiking, horseback riding, visiting the 5,000-acre archeological district and exploring the old narrow-gauge mining railroad of Gunnison. In the area, there are trails ranging from easy to very strenuous. Close to the park, attractions include the Black Canyon of the Gunnison National Park and the Gunnison Gorge National Conservation Area. Visitor centers are located at Blue Mesa Point, which overlooks where the lake and the Black Canyon of the Gunnison meet, Elk Creek Marina and Cimarron. There are also overlooks at Dillon Pinnacles trail and Hermit's Rest trail.
The Blue Mesa Reservoir sits on an area of "high desert" land in Western Colorado, just west of Gunnison. Although not quite as hot as other towns west on these desert lands, it can be very comfortable and warm in the summer months. However, winter months can have exceedingly cold temperatures, with the average January low temperatures just under 0 °F. Rainfall is scarce, averaging only 9 inches. It does snow on these desert lands, but the snowfall usually melts quick due to the high altitude, dry climate, and abundant sunshine, even in the winter months. Wiki