the race.

135 miles.

2 mile swim. 16 mile run. 10 mile paddle. 10 mile carry. 97 mile bike.

The Oahu Pentathlon is a journey of endurance and community spirit to circumnavigate the island of Oahu. Whether you share the experience with an Adventure Team or take on the epic Solo Trek, this is a challenge that will push you to your limits - and beyond.


You have 24 hours from sunrise to sunrise to complete the challenge.

  • the swim.

    The Oahu Pentathlon starts at sunrise at the Kailua Boat Ramp with a 2 (ish) mile swim that follows the shoreline of Kailua Bay to Castles Beach. Most of this length is shallow and buoys will mark your path - if you’re lucky, you might encounter a turtle! If you’re not, maybe a jellyfish.

  • the run.

    This second leg picks up where the swim leaves off at Castles Beach. You’ll take a short shot down the beach path and hit the road, jack! This 16-mile stretch will blend urban and scenic roadways all the way to Kualoa Regional Park.

  • the paddle.

    If you’re using a paddle - it counts! Race kayaks, outriggers, leisure kayaks or any kind of canoe will do. You’ll start this 10-mile course just across from Chinaman’s Hat and head north to Kokololio Beach Park. This is not a beginner’s course or for the faint of heart… come prepared for some swell!

  • the bike (1/2).

    The biking portion of the Oahu Pentathlon is split into two sections. The first, 31-mile leg starts after the paddle. You’ll continue on to cover the beautiful (and bumpy) North Shore - bring a spare!

  • the carry.

    This 10-mile leg splits up the bike by starting off near the western tip of the island and rounding Kaena Point, a state park and bird sanctuary. There’s a good chance you’ll catch the sunset on this trail so make sure you’ve got a headlamp! We’ll have your sandbag ready for you.

  • the bike (2/2).

    This 66-mile stretch completes the second half the bike leg and it’s the final home stretch! Starting on the west side of the island at Kea’au Beach Park, you’ll navigate through “town” along the south side, past a few craters and around the eastern tip before rolling back into Kailua. Meet us back at the boat ramp to collect your well-earned finish medal!

IMPORTANT NOTE

Course details are subject to change. Due to an intensive permitting process and factors out of our control (including weather), changes may be made at any time prior to the start of the event. Registered athletes will have regular email communication leading up to the event to have you as prepared as possible for this ADVENTURE challenge. If you’re the type that needs to be in control of the details, this won’t be for you!

 two ways to participate

TWO TO SEVEN

adventure team.

This option allows between two to seven teammates to split the entirety of the course in any manner of their choosing. You can split the swim, you can split the run, you can do it together or however you want! Or you could pass it on relay-style. This is a great for weekend-warriors and friend groups who want to enjoy the best of Oahu.

INDIVIDUAL

solo trek.

For the soloist, this is the ultimate endurance event and not for the faint of heart. We recognize that nothing is ever a true solo effort and you’ll still need a team to support you if you’re going to attempt the Oahu Pentathlon in its entirety. Remember… you’ve got 24 hours!

Endurance races aren’t your thing?

Join us a volunteer instead. This event is made possible only by the community that gathers to make it happen for the vision of many. Experiencing this epic event through the lens of a volunteer allows you to see the island like a local. Learn more.