Boston Urban IditarodMarch 7, 2015 - Boston, Massachusetts 1 of 10
A silly take on Alaska's famous dog sled race, the Urban Iditarod is completed by teams of four to six "doggies" (human runners). Teams navigate the course on sleds, also known as shopping carts, for a true urban adventure. Teams come up with their own themes and over-the-top costumes for this hilarious scene on the streets of Beantown.
Superhero ScrambleMarch 28, 2015 - Dallas Texas 2 of 10
This superhero-themed obstacle race provides you with the perfect excuse to wear your favorite cape. To test your superhero abilities, the course requires runners to sprint, climb, and scramble their way to the finish line.
Brides RunApril 26, 2015 - Various cities 3 of 10
If you're in the midst of planning your wedding, you'll be hard-pressed to find a better event than this. Runners get to blow off some pre-nuptial steam by competing in their goofiest white dresses and tuxedo T-shirts for this race. The post-race party even includes local wedding vendors to help you get ready for your big day.
Zombie RunOctober 24, 2015 - Perry, Georgia 4 of 10
This 5K obstacle course will test your endurance and strength. On top of requiring you to navigate tricky terrain, hungry zombies pursue runners in an attempt to steal as many "health flags" as possible. Whether you come dressed as a zombie or a survivor, you're sure to have a scary good time.
Monster DashOctober 31, 2015 - Various ciites 5 of 10
The Monster Dash offers a new and fun way to celebrate Halloween. Dress like your favorite monster or dust off any old costume and jump into the fun at this spirited event. With multiple distances to choose from, there's something for everyone.
Devil's Chase 6.66 MilerOctober 31, 2015 - Salem, Massachusetts 6 of 10
You better run like hell if you plan on participating in this event. Join the masses of devil costume-clad runners for this ghoulish race, which is complete with zombie dancers and a zombie fashion show.
YMCA Dallas Turkey TrotNovember 26, 2015 - Dallas, Texas 7 of 10
This event includes both a 5K run/walk and an 8-mile run, encouraging participants to don a turkey costume and get into the spirit of the season (not to mention the extra calorie burn before the big meal).
Bad Prom RunVarious dates and cities 8 of 10
Grab a date and throw on your best party dress for this silly prom-inspired event. This nighttime throw-back race takes participants along a course marked by some of the most classic prom themes, like "Under the Sea" and "Titanic."
Santa Hustle 5KVarious dates and cities 9 of 10
This race makes your costume planning easy by providing all participants with identical sweatshirts, Santa hats, and beards for the race. This means that on race day, the streets are filled with a sea of Santas. In theme with the Christmas holiday, candy canes and cookies are served along the course.