Mary Lou Triathlon
- Date
- June 14, 2026
- Distance
- Mary Lou Triathlon · Mary Lou Team Triathlon
From the Organizer
June 14, 2026
This race was previously named the Bald Mountain Triathlon, and was held at Bald Mountain Ski Area in 2020, but moved to Deyo Reservoir for 2021 and 2022 and was renamed in honor of the Deyo Family matriarch in 2023.
The race will be located at the Deyo Reservoir outside of Weippe, Idaho. The swim will take place from the sandy beach and traverse 300 yards before transitioning to mountain bike gear and leaving the reservoir along Schmidt Mill Road to 3-mile Road to Fidler Road and then along a forested trail back to 3-mile Road and the reservoir, approximately 13 miles. The run course will be the well-travelled 2.2 mile trail around the reservoir. There will be a single transition area.
Packet pick up:
Saturday, June 13, 3:00 - 5:30pm at the Schmidt House across from Deyo Reservoir
Sunday, June 14, 6:30 - 7:00am at Deyo Reservoir
Athlete briefing: Saturday, June 13, 5:00pm at Schmidt House and Sunday, June 14, 7:30am at Deyo Reservoir
Start time: Sunday, June 14, 8:00 am; Deyo Reservoir
Limited Parking Available
Camping available http://www.weippe.com/deyo/
Safety:
No roads are closed for this race, however there will be traffic control at major intersections. It is your responsibility to yield to traffic. The good news is most of this race is on lightly travelled gravel roads and trails and traffic is minimal in the areas where you will be sharing the road.
Rules:
This is not a USA Triathlon (USAT) sanctioned event and you do not need to have a USAT card to participate, however we will be abiding by USAT rules. https://www.teamusa.org/USA-Triathlon/About/Multisport/Competitive-Rules
We discourage the use of wetsuits for this short swim, however if water temperature is less than 84 degrees they are allowable.
No lifejackets allowed.
Helmets required for the duration of the bike ride.
*Youth Registration* https://docs.google.com/document/d/1u-0A5e5p-0a9JRsnqedWKeygEvFlPfI01YAsCZx6WjQ/edit?usp=sharing
Events
Weather
Typical Conditions
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
70°
Typical Low
42°
Chance of Rain
38%
Based on US Climate Normals data from Pierce, 10 mi from the venue.
Host City
About Weippe, ID
Elevation
3,048 ft
Nearest Airport
LWS
Lewiston Nez Perce County Airport · 51 mi
Major Hub
GEG
Spokane International Airport · 114 mi
Time Zone
Pacific Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Race Location
Your Next Start Line
What Are You
Waiting For?
Every finish line starts with a single decision. Claim your spot at Mary Lou Triathlon, put it on the calendar, and turn “someday” into a start date.
Coming Up
More Triathlon races near Weippe, ID
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119 miles away
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Sprint
105 miles away
Littlefoot Triathlon - CDA
99 miles away
YFC Seeley Lake Challenge Triathlon/Duathlon
129 miles away
From Endurance Grid
About This Sport
Endurance Grid is here to help you understand the sport, decide if it's the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer's event page.
Three sports, one race — swim, bike, run in sequence, with transitions that are a discipline of their own.
Open water, open roads, and competition with yourself. Cross the finish line knowing what it took to get there.
Triathlon
Swim, bike, run — back to back. The sprint distance makes it far more accessible than most people think.
Frequently Asked Questions (FAQs)
- What is the Mary Lou Triathlon?
- Mary Lou Triathlon is a triathlon race held in Weippe, Idaho on June 14, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more triathlon races near you or explore our sports guides to learn what race day actually feels like.
- When and where is the Mary Lou Triathlon?
- Sunday, June 14, 2026 in Weippe, Idaho at 4137 Schmidt Mill Road, Weippe, ID. Check the event page for exact start times and wave schedules.
- How do I register for the Mary Lou Triathlon?
- Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.
Mary Lou Triathlon
Jun 14, 2026