Red Rock Canyon is located just 30 minutes west of Las Vegas. It's perfect for trail running, but for some reason I saw very few people running there one recent weekend.
The Grand Circle trail is about 11 miles long, and it starts right outside the Visitor's Center. It's pretty easy – it loops around the valley and has barely any elevation gain. I made some detours along the way to add a bit of distance, aiming for a 13-mile run. However, when I got to the 10-mile point, it rained out on me. Desert storms remind me of tropical thunderstorms – the sky turns dark in an instant, and it starts unloading on you. Fortunately, I hitched a ride back to the Visitor's Center where my car was parked.
Here are a couple pictures of Red Rock Canyon before the storm: