Runners strip down to run the Kona Underpants race

Images from the 2015 Kona Underpants Run http://t.co/etIGhUoTPz #triathlon #IMKona2015 pic.twitter.com/FeYyK7wcO2

— slowtwitch.com (@slowtwitch) October 9, 2015

There’s perhaps no running event kookier than the annual Kona Underpants Run. Leading up to the Ironman event, organizers get together quite the crowd of runners and have them run 2.4K in their underwear.

A fun and somewhat rowdy race, the Underpants Run has taken place every single year celebrating it’s 18th running Thursday morning at 7:30 a.m. at the location where the Ironman banquet takes place. It was started Chris Danahy, Tim Morris, and Paul Huddle and since it’s first year, it has grown to become a local fundraiser backed by major sports brands, Garmin being one of them. 

It serves as a sort of pre-event ice breaker and isn’t really for the shy runner. Over the course of its history, it has raised $240,000. For those who enter, the suggested donation is $20. 

Interested in this wacky event? Check out scenes from Thursday’s race? 

Team @WattieInk getting ready. #underpantsrun #kona2015 pic.twitter.com/KnV7M9k3pK

— Tri Magazine Canada (@TriMagCan) October 8, 2015

Team Every Man Jack getting ready for the big show #underpantsrun #kona2015 pic.twitter.com/2qDRKi51BX

— Tri Magazine Canada (@TriMagCan) October 8, 2015

The underpants run in Kona is just as big as Ironman. Thousands take part #ironmanworldchamps #kona2015 pic.twitter.com/4IHxo7myPA

— Tri Magazine Canada (@TriMagCan) October 8, 2015

Images from the 2015 Kona Underpants Run http://t.co/etIGhUoTPz #triathlon #IMKona2015 pic.twitter.com/FeYyK7wcO2

— slowtwitch.com (@slowtwitch) October 9, 2015

GALLERY: A look through the second biggest event at #IMKona – The Underpants Run! http://t.co/QNmXGWHCgv pic.twitter.com/eFGu0FmUQp

— LAVA Magazine (@LavaMagazine) October 9, 2015

Thanks @bettydesigns and @Bonk_Breaker for an awesome morning at the Kona Underpants Run! pic.twitter.com/ua4cVPYNvQ

— Erica McClurg (@ricajo) October 8, 2015

Buncha #underpants run vids and photos uploaded on my #konacam! http://t.co/jDJF2sm047 pic.twitter.com/xTTbckJBJt

— Jesse Thomas (@jessemthomas) October 8, 2015

@ironmantri @ironmantri @underpantsrun #IMKona2015 #ironmanworldchampionship #underpantsrun #raceforareason #konaunderpantsrun #run #undierun #wonderwoman #undies #underwear #kona #konahawaii #ironmantri #ironmantraining #runtoinspire #runhappy #runningcommunity #friends #triathlete #triathlon #triathlontraining #underpantsrun #wonderwoman #kona #hawaii #charityrun #helloladies

A photo posted by Yoga Peach (@yogapeachblog) on Oct 8, 2015 at 5:15pm PDT

@ironmantri @ironmantri @underpantsrun #IMKona2015 #ironmanworldchampionship #underpantsrun #raceforareason #konaunderpantsrun #run #undierun #wonderwoman #undies #underwear #kona #konahawaii #ironmantri #ironmantraining #runtoinspire #runhappy #runningcommunity #friends #triathlete #triathlon #triathlontraining #underpantsrun #wonderwoman #kona #hawaii #charityrun #ironmantriathlon

A photo posted by Yoga Peach (@yogapeachblog) on Oct 8, 2015 at 5:14pm PDT

#grannytriwear #0port-o-let #konaunderpantsrun #Kona #imkona #upr2015 @ironmantri

A photo posted by Sandy Johnson (Holt) (@irongirlsandy) on Oct 8, 2015 at 12:02pm PDT

Photobombing surfer @sunnygarcia in the Underpants run this morning. #konaupr15 #konaupr #konaunderpantsrun #ironmankona #ironman #underpantsrun #undierun #undierun2015 #IMWC #imwc2015 #run #running #health#excerise #wattieink #ironmanworldchampionship #ironmanworldchampionships #starwars #marvel #marvelcomics

A photo posted by Jeff Wong (@jeffbwong) on Oct 8, 2015 at 12:58pm PDT