Las Vegas, NV. Marathon (6:15 AM); Half (7:00 AM); 5K (7:45 AM). Majestically framing the west side of the valley, Red Rock Canyon is the most notable natural treasure in the Las Vegas area. Federally designated as a Backcountry Scenic Byway, the 13 mile paved scenic drive traverses some of the Mojave Desert's most stunning vistas. Sandstone formations, desert vegetation, and wildlife bring this place to life. The birthplace of Calico Racing! The trailheads "Calico Hills" inspired the namesake and…