The Official GPS Mapping App of 2021 King of the Hammers Race

What is onX Offroad?

Get the App for Less than a Tank of Gas

onX Offroad App offers more than 425,000 miles of off-road trails and roads across the nation and into Baja. Check out trail descriptions, photos, recreation points like campsites and trailheads, Track your trips, and share trails and markups with friends.

No service? No problem. The GPS in your mobile device works perfectly offline, even when the network is nonexistent. You can download the maps before you go and have access to all of the onX Offroad features.

Get the App + View the Course

Use code:  ULTRA4  at checkout for 20% off

Racecourse Map Released
January 28th @ 12pm PST.

onX Offroad is the official GPS mapping tool of the 2021 King of the Hammers, one of the most grueling off-road races of the year. Download the Premium App to view:

Event schedule
Spectator areas
Vendor row
The race pits
And more!

Make sure to download your maps starting January 28th so you can access all details, including trails, without cell service.

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Watch the KOH Livestream Here