Big Cottonwood Canyon is a canyon in the Wasatch Range 12 miles (19 km) southeast of Salt Lake City in the U.S. state of Utah. The 15-mile (24 km)-long canyon provides hiking, biking, picnicking, rock-climbing, camping and fishing in the summer. Its two ski resorts, Brighton and Solitude, are popular among skiers and snowboarders. The canyon is accessed by The Big Cottonwood Canyon Scenic Byway, which runs its length to Guardsman Pass at the top of the canyon, allowing travel to Park City in the summer months. Hiking to the canyon’s mountain lakes is popular, with many trails leading to lakes such as Mary, Martha and Katherine. The canyon’s most popular hiking trail leads to Lakes Blanche, Florence and Lillian. The trail is 3.1 miles (5.0 km) long and a strenuous hike. The canyon is also a frequent destination for Utah Native Plant Society wildflower walks and for University of Utah botanical field trips. The canyon and the adjoining Little Cottonwood Canyon contain significant biodiversity and are home to a number of rare and endemic plant species.