Events
O2K Marathon - MARCH
47 spots left. Price increases after December 7, 2025 at 11:59pm EST
O2K Half Marathon- MARCH
46 spots left. Price increases after December 6, 2025 at 11:59pm EST
Place
Oak Ridge, TN US 37831
Description
Event Information
Participation Cap
This event will be limited to 50 participants total, accepted on a first-registered basis.
Event Purpose
The race is structured to provide athletes with the opportunity to achieve a Boston Marathon Qualifying (BQ) standard or a benchmark Half Marathon performance. The course has consistently produced qualifying results, and the intent is to attract competitors pursuing age-group standards for Boston or other national and international events.
Eligibility
This event is intended for serious competitors actively seeking qualification times.
Participants should register only if they are capable of meeting, or coming very close to, their Boston Marathon age-group qualifying standard.
Reference official standards here: Boston Marathon Qualifying Times.
Cut-off Times
Half Marathon: 2 hours, 5 minutes
Marathon: 4 hours
Race Format and Conditions
This event will be conducted in a low-profile, performance-focused format.
No shirts, awards, or amenities will be provided.
The course will be open to light vehicular traffic; runners will utilize the bike lane/shoulder. Headphones are prohibited.
The initial 30 minutes will be run in darkness under street lighting. Participants must wear high-visibility clothing, reflective gear, and a headlamp or flashlight until daylight improves conditions.
Course Certification and Details
Marathon
Out-and-back format on the Oak Ridge Turnpike
Less than 600 ft total elevation gain
USATF Certified Course (Certification Code: TN21010MS) – valid for use when registering for the Boston Marathon
Halfway split will be recorded
Half Marathon
Point-to-point format along a highway with bike lane/shoulder
Less than 400 ft total elevation gain
Participants must arrange their own transportation back to the start; a limited number of return seats will be available through race management
Course Support
Aid stations will be located at:
Miles 3, 7, 11 (outbound)
Miles 15, 19, 23 (marathon only)
Competitors are expected to be largely self-supported and should bring their own fuel and supplies as needed
Registration and Packet Pickup
Race Day Only: Beginning at 4:45 AM
Participation Cap: 50 runners (exceptions may be granted in limited circumstances, including slightly over-standard qualifying times or requests after the cap has been met; inquiries should be directed to the race directors).
Race Contact Info
If you have any questions about this race, click the button below.
Course Map
Course is an out and back for Marathon and a one way route for Half Marathon race.
Course will begin on N. Jefferson Circle in Oak ridge and will turn Right onto Jefferson Avenue and then another right onto the Oakridge Turnpike and will remain on the turnpike for the remainder of the race. Marathon race will retrace the route on the same side of the Turnpike and will turn back onto Jefferson Ave and again onto N. Jefferson Circle to Finish/ Start line.
The out and Back course segment can be found on Strava here.
Parking & Restrooms
COURSE RECORDS
Marathon
Male- Ethan Coffey 2:27:18 2021
Female- Bekah White 3:04:58 2022
Half Marathon
Male- Owen Clemons 1:11:42 2025
Female-Peighton Meske 1:15:49 2022
Directions
Race Participant Survey
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