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Adventure racing team
Couple adventure racing
Couple adventure racing

17th Annual Adventure-O

Date:  Saturday, July 21, 2018
Location:  William O'Brien State Park
Courses:  6 - 8 hour Adventure Race
Start:  9:00am to 5:00pm


The 17th Annual Adventure-O will take place in William O'Brien State Park. William O'Brien provides a beautiful setting for quality recreation along the banks of the St. Croix River. Hiking trails offer quiet exploration of the park's rolling, wooded hills. For anglers, the channels of the St. Croix have northern, walleye, bass and trout. Ideal for canoeing, the river is also a migratory pathway that offers visitors an exciting diversity of sights and sounds. In the winter, snowshoeing, skiing and camping attract enthusiasts.

For teams of 2 to 4, or solo racers. All abilities are welcome! (field limit: 100 racers)


Teammate Finder

Need help finding a team?  Check out our Teammate Finder!


What to Expect

  • Multiple maps (e.g., orienteering map, USGS map, aerial map)

  • Excellent Navigation

  • 5-10 miles Running/trekking

  • 2-5 miles Canoeing (Boats, paddles, and PFDs provided)

  • 20-25 miles Biking on asphalt/gravel roads and singletrack

  • Food and beverages provided after race

  • Commemorative racewear and other swag


Mandatory Gear List

  • Be sure to read our Mandatory Gear List.  Participants will not be allowed to participate unless they bring this equipment.



  • Be sure to read our Announcements page for the latest information about the event.



  • 8:00 - Check-in

  • 8:45 - Pre-Race Meeting and Map Distribution

  • 9:00 - Race Starts

  • 4:00 - Awards

  • 4:10 - BBQ & Social

  • 4:30 - Course Closes



  • On or before May 21: $75/person *

  • May 22-June 30: $90/person *

  • July 1-July 17: $100/person *


* Solo racers pay $10 extra


The park is located 12 miles north of Stillwater. The park entrance is right on State Highway 95, 3 miles south of Highway 97 and 2 miles north of Marine on St. Croix. After turning onto the park road, the ranger station is immediately on your right. Start location for this event is at the lower parking area near the boat launch - follow the O-Meet signs.

Come Clean Leave Clean

The Minnesota Orienteering Club practices a Come Clean Leave Clean policy. This helps us maintain a good relationship with the parks we utilize, sets a good example, and limits the transfer and spread of many of the plants that make our venues less enjoyable.


It takes a handful of volunteers to make each of our events successful. If you would like to learn more about volunteering, please see our Volunteering page. MNOC would like to thank you for volunteering. We have a limited number of $5 REI gift cards for each meet to give thank you's to volunteers. If you would like one, please ask the race director.


Race Results

Race results are usually published within 24 hours of the event. View our Race Results page to see the results.


Race Management

  • Race Director: Peter Wentzel

  • Setter:  Andrei Karpov

  • Vetter: Dave Swanson



If you have any questions or comments about this event, please feel free to Contact Us.


Refund Policy

There is a $30.00 non-refundable deposit when registering for a MNOC Adventure-O event. Teams register by paying the entire team registration fee in full. Teams are not considered registered until full payment is received. Teams may change categories between 2-person and 4-person, as long as there is available space in the event. Teams that have teammates who fall ill or cannot participate due to unforeseen events are expected to find replacement teammates. All teams are subject to the following refund schedule; there are no exceptions. Team name and teammates may be changed up to race-day registration. Contact the registrar to make any changes.

  • Full refund less non-refundable deposit within 30 days of date of registration, up to 30 days before the race.

  • 50% refund less non-refundable deposit, up to 30 days before the race.

  • No refunds within 30 days of the race date.

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