Saturday, Sep 17, 2022

O'Brien Trail Races, 50k, 10 miler

16821 O'Brien Trail North

Marine on St Croix, MN 50K, 10.4 Miler, 5k

Registration closes: Sun, Sep 11 @ 11:59PM


O'Brien state park
15 mins north of Stillwater

16821 O'Brien Trail North
Marine on St. Croix, MN 55047

Marine On St Croix Weather and Forecast

William O'Brien State Park


50k course will run the 10.4-mile course 3 times. The course is mainly a wide grass trail with rolling hills. The hills will add up over the 3 loops.
Race starts at 8 am with an 8 hour time limit
Aid stations on each loop will be at mile 2.5, mile 5.5, mile 6.5 plus the end of each loop.


There will be no refunds.

If COVID-19 and /or other conditions force the event to be be shut down and /or conditions are not safe the event will be made to a virtual event. If this happens race shirt and race number will be sent out with in one week of the completion of the event.


5k for only $5.00!
Reason we are doing a 5k for $5 is because of a few reasons. The first one is to make it family friendly event. Other reason is to introduce new runners to the trails. But don't be confused this is still a race and official times will be kept so if are an experience runner and want to race it - go ahead!!
There is no t-shirts.

10.4 Mile

Race starts at 9am with a time limit of 2.5 hour time limit on finishing.

Course is mostly wide grass trails with plenty of rolling hills. From mile 1 till 2 you run along the St. Croix River under large pines with a gravel path.

Aid station at Mile 2.75, 5.5 and 6.5. Aid station will have water and Gatorade only.

See link for course map with the state park trails listed.

See Link for mile markers.

See link for elevation

General Info

No external music during the race. If you would like to have music please use headphones. Respect your fellow runner and campers at the park. Awards will be top 3 overall male and female.
Aid station will be available at mile 2.5 (water only), and mile 5.5 and 6.5 (water Gatorade, cookies, and other items)
5. Post-race will have bottled water, Coke, cookies, granola bars, and bananas.

Local time: 12:50 AM


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