Run for Your Lives
Credit: HGL Productions

Distance: 3.2 miles

Obstacles: 10–12 obstacles and hundreds of zombies

Difficulty: "The zombie apocalypse can happen anywhere," says Derrick Smith, a co-founder of this race-meets-theatrical-production. Likewise, the terrain for Run for Your Lives varies from flat to hilly, depending on the venue. The added difficulty, of course, is zombies, who can "kill" you by taking all three of the red flags from your belt.

The Vibe: It's all about zombie kitsch with blood pits, abandoned buildings, and trails that dead-end into zombie hoards.

Cost: $67–$87;