The Insane Inflatable 5K -- a dynamic fun run series comprised of inflatable obstacles -- coming to Grand Rapids at Millennium Park is now on Aug. 15 and 16.

The second day was just added because of local demand.

The 5-kilometer (3.1-mile run) isn’t focused on running. Instead, it's about having fun negotiating oversized inflatable obstacles on a challenging course requiring imagination, creativity and a heaping helping of insanity.

The Insane Inflatable 5K Grand Rapids' course is to incorporate extreme inflatable obstacles across the rolling 1,500 acres of terrain at Millennium Park, 1415 Maynard Avenue SW in Walker off Butterworth Avenue SW.

The event is for competitive runners wanting a different kind of challenge, weekend warriors seeking the next great obstacle course and armchair athletes desiring something fun and new. Children can take part, too, with the suggested minimum age 8 years old and the minimum height requirement 3 feet, 6 inches tall.

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The 11-plus inflatables range in size and complexity. They include Pure Misery, a 100-foot obstacle testing strength, agility, flexibility and endurance; Jump Around, with more than 70 feet of bounce pad; and Vertigo, where participants climb atop the six-story-tall structure and slide down to finish the race.

Insane Inflatable 5K Grand Rapids will also include games, food, beverages, merchandise and swag from local vendors and sponsors. A portion of proceeds will go to a local charity.

The Insane Inflatable 5K Grand Rapids will open at 8:45 a.m. EDT Aug. 15 (a Saturday) and 9 a.m. EDT Aug. 16 (a Sunday). On Aug. 15, there are 12 waves of participants in half-hour increments running through noon EDT starts. On Aug. 16, there are seven waves in half-hour increments running through 11:30 a.m. EDT starts.

The registration fees, which include an event t-shirt and medal on completion, are:

  • $52 for advance registration through April 17.
  • $54 for advance registration April 18 through May 29.
  • $59 for advance registration May 30 through June 26.
  • $64 for advance registration June 27 through July 10.
  • $75 for registration on Aug. 15 and 16, the days of the event.

Check Out the Insane Inflatable 5K

Check Out the Insane Inflatable 5K Obstacles