Las Vegas, NV

Following the Historic Railroad Trail in Lake Mead National Recreation Area, this long half marathon/12k race follows a tough but gorgeous gravel route through six tunnels out to the Hoover Dam. There are also equally pretty 5k and 1 mile routes for a less strenuous morning. With any choice, expect a few metabolism revving hill climbs. Thursday, November 23, 7:30 am.

Essentials