5K · 10K · Indianapolis, IN
The Big BO 50k
**PLEASE NOTE IF YOU REGISTER AFTER 9/22, WE CANNOT GURANTEE MEDAL OR SHIRT** Stay Obsessed. and the B&O Trail Association are proud to welcome you to the First Annual Big BO 50K Ultramarathon Join your fellow run obsessed friends on the newly completed B&O Trail for a fast, exciting 50K experience unlike any other in…
Start line: Daredevil Brewing Co.
This race has passed
The 2026 running was Saturday, October 10, 2026. No 2027 date is announced yet — this page updates daily as the organiser posts one.
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Past editions
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Frequently asked
- When is the The Big BO 50k?
- The The Big BO 50k most recently ran on Saturday, October 10, 2026. A new date has not been announced yet — this page updates daily as the organiser posts one.
- Where does the The Big BO 50k start?
- The The Big BO 50k starts at Daredevil Brewing Co. in Indianapolis, IN.
- What distances does the The Big BO 50k offer?
- The The Big BO 50k offers 50k, 25k, 10K and 5K.
Listed on RunSignup. 1 past edition recorded. Race details are the organiser’s — confirm the date and start time with them before you travel.