Ugly Dog Triathlon

Sat July 27, 2024 Grass Lake, MI 49240 US Directions
"Ugly Dog Gravel Tri is a great event! Swim is nice and the gravel roads rocks. The trail run is a perfect out and back. Swag and vibe is excellent!"

- Katy Stone, 2022 Participant
Countdown to Race Day



$79 - $139 9:00AM - 9:30AM EDT
Events: Olympic Triathlon Sprint Triathlon Super Sprint Triathlon


$69 - $129 9:00AM - 9:30AM EDT
Events: Olympic Duathlon Sprint Duathlon Super Sprint Duathlon


$69 - $129 9:00AM - 9:30AM EDT
Events: Olympic Aquabike Sprint Aquabike Super Sprint Aquabike


$139 - $179 9:00AM - 9:30AM EDT
Events: Olympic Relay Sprint Relay

Ugly Dog Virtual Event

$55 Registration ends July 27, 2024 at 11:59pm EDT

Race Website

Additional race information can be found at


11500 Seymour Rd.
Grass Lake, MI US 49240



Ugly Dog is based out of Waterloo Recreation Area in Grass Lake, Michigan. The race begins with a swim in Big Portage Lake followed by a bike ride on amazing gravel roads, and finished with a trail run.

This event offers super sprint, sprint, and olympic distance triathlons, aqua bike, duathlon, and relay.  With 12 different events there is something for everyone!

In the spirit of bike racing, drafting rules will not be enforced in the Ugly Dog events and aerobars are not allowed.

USA Triathlon Membership/One-Day Pass
You will be asked to enter your current USAT Membership number during checkout. USAT Membership or One Day Pass is required to participate in this USAT Sanctioned event. One Day Pass fee is $15.

The venue for this event requires either a Michigan Recreation passport on your vehicle or a $10 one day parking pass to purchase onsite. 

Race Contact Info

If you have any questions about this race, click the button below.

Other Tris4Health Events

We are more than just triathlons.

While we started with Grand Rapids Triathlon and Michigan Titanium, we have since expanded into gravel cycling, road cycling, trail running, and road running while not forgetting our tri roots.  New for 2024 will be a tri series including all 6 of our triathlons (Grand Rapids Tri, Michigan Titanium, Grand Haven Tri, Bear Lake Tri, and our two gravel triathlons, Ugly Dog Gravel Tri and The Dirty Mitten).  We also produce three gravel bike events: Waterloo G+G, The Dirty Mitten Gravel Bike Race, & Rode To Hell along with the state's largest road bike event, Grand Rapids Gran Fondo.  If running is your thing be sure to check out the Armed Services Marathon and the Brainy Day trail run.  We have something for everyone!

Please visit to see all of our events!



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