The Big BO 50k 2026
- Date
- Saturday, October 10, 2026
- Start time
- 7:00 AM start (Indiana)
- Location
- Indianapolis, Indiana
- Entry fee
- From $40
- Included with entry
- Includes a shirt
Registration is open.
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Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| 50k | 50K | Oct 10, 20267:00 AM | $90 | – |
| 10k | 10K | Oct 10, 20269:00 AM | $48 | – |
| 25k | Other | Oct 10, 20269:00 AM | $70 | – |
| 5k | 5K | Oct 10, 20269:00 AM | $40 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
Race day planning
Entry fee schedule
- 50k: $90 until Oct 10.
- 10k: $48 until Oct 10.
- 25k: $70 until Oct 10.
- 5k: $40 until Oct 10.
Online registration closes Oct 10, 2026, unless the race fills first.
What a typical finish looks like
A typical finisher at a 50K in Indiana runs 6:58:18, about 13:28 a mile, based on 4 races with published results. Women typically finish in 7:36:08 and men in 6:55:19.
Light and altitude
Sunrise on race morning is at about 7:48 AM, and the 50k starts at 7:00 AM. The start sits about 740 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
Daredevil Brewing Co., Indianapolis, IN 46224
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Typical race-day weather
Around October 10 the day usually runs from 49°F at dawn to 71°F in the afternoon, with measurable rain on about 19% of days. Cold snaps dip to 40°F and hot years reach 80°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
Race details
- Where
- Daredevil Brewing Co., Indianapolis, IN 46224Map
- Course
- Road
- Start elevation
- About 740 feet
- Included with entry
- T-Shirt
- Distances
- 5K, 10K, 50K, Other
- Editions
- 2026 (Oct 10, 2026)
Organize this race? Add details or a correction
Plan your race
Quick answers
- When is The Big BO 50k?
- Saturday, October 10, 2026, starting at 7:00 AM.
- How much does it cost?
- Entry starts at $40 before processing fees.
- When does registration close?
- Online registration closes Oct 10, 2026, unless the race fills first.
- Do runners get a shirt or medal?
- Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
- What distances can I run?
- 5K, 10K, 50K, Other.
- Where does it start?
- Daredevil Brewing Co., Indianapolis, IN 46224.
From the organizers
**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 central Indiana.
The journey begins at Daredevil Brewing Co. in the heart of Speedway — the Racing Capital of the World — and covers the entire length of the B&O trail through Marion and Hendricks County. You’ll Head east toward downtown Indy for a few miles before turning around head out to rural Hendricks County before making the return trip back to Speedway.