Whether you're looking to channel your inner Ariel with a half marathon fit for a princess or revisit your party days with a foamy 5K. And yes, there's mud.
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Run through Disney parks and resorts and earn Disney-theme finisher medals as part of the runDisney program, which features a lineup of 5Ks, 10Ks, kids races, and health and fitness expos, attracting upward of 187,000 runners from across the country each season. One of our favorites is the Disney Princess Half Marathon, where you can "let it go" (sorry—couldn't help it) while running dressed as and alongside your most beloved princesses. If you're looking to travel outside the country, Disney also hosts events at its Paris and Castaway Cay, Bahamas, locations.
Upcoming runs and registration: rundisney.com
Photo: Disney Resorts
Insane Inflatable 5K
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Remember how much fun you used to have jumping in those bouncy houses? Bring it back with the Insane Inflatable 5K, where you'll run a 3.1-mile course complete with 11 insane inflatable obstacles, including climbing walls, ball mazes, and giant—and we mean giant—slides (don't be surprised if you get a little wet along the way).
Upcoming runs and registration: insaneinflatable5k.com
Photo: Insane Inflatable 5K
5K Foam Fest
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If you want to take your love of inflatables to the next level, just add foam. At least, that appears to be the thinking behind the 5K Foam Fest, a run (or shall we say party?) that consists of various obstacle courses, including tire steps, lily pads, mud pits, and the beloved Chamber of Foam. Stick it out and you're in for one foamy finish at the end.
Upcoming runs and registration: the5kfoamfest.com
Photo: 5K Foam Fest
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Keep the foam party going with the Bubble RUN, a 5K that features waves every three to five minutes and colored foam bogs every kilometer. And, of course, no rave would be complete without a DJ spinning at the finish line (don't forget to hit up the food trucks and free swag to celebrate your achievements).
Upcoming runs and registration: bubblerun.com
Photo: Bubble RUN
The Color Run
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Another way to brighten up your fitness routine (ahem, and Instagram) is with The Color Run, which, in 2011, introduced the world's first Color 5K as a way to "bring people together and make the world a happier, healthier place." If being splashed with colorful powder to commemorate your progression throughout the course isn't enough to put a smile on your face, the post-5K party will typically do the trick.
Upcoming runs and registration: thecolorrun.com
Photo: The Color Run
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If you visit the Tough Mudder website, you're welcomed by a quote that reads "Tough mudder is no ordinary mud run—it's a way of life." And, with a range of challenges and races designed for varying levels of strength and endurance (including the World's Toughest Mudder, which lasts a whopping 24 hours) and its own Tough Mudder Legion community, it's easy to see how one could get sucked in. You can also make it a family event with the Mini Mudder, a 1-mile obstacle course for adventure-loving kids.
Upcoming runs and registration: toughmudder.com
Photo: Tough Mudder
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Spartan is another race that offers varying endurance and race events (over 200 in more than 30 countries) to keep you on your toes. Start out with the Spartan Sprint (3 to 5 miles; 20 to 23 obstacles) and learn to expertly spear, climb and hoist your way to Super and Beast status.
Upcoming runs and registration: spartan.com
Photo: Spartan Race
Rock 'n' Roll Marathon Series
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Pump up the volume (literally) with this rock 'n' roll–theme marathon, which marks every mile with a different live music performance—from drum lines to DJs to live bands—and often concludes with a free concert. Past headliners have included Goo Goo Dolls, The Wallflowers, and Pitbull. There's also a 5K for music-loving beginners.
Upcoming runs and registration: runrocknroll.com
Photo: Rock 'n' Roll Marathon Series
Hot Chocolate 15K/5K
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Indulge your sugar cravings while on the move, thanks to this seriously sweet running event. According to the website, approximately 4,000 pounds of melted chocolate are distributed at each race. 15K finishers also receive a special medal in the shape of a chocolate bar wrapped in gold to display proudly for years to come.
Upcoming runs and registration: hotchocolate15K.com
Photo: Hot Chocolate 15K/5K
Murder Mystery 5K
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Challenge your mind and body with this Murder Mystery 5K, which sends you on a "whodunit" scavenger hunt throughout your city. Clue have you stumped? Take on a dare to advance to the next level.
Upcoming runs and registration: murdermystery5k.com
Photo: Murder Mystery 5K