
Frontline OCR is an obstacle course and rucking race on May 22, 2027 in Byron, IL, with entry fees from $39 to $550.
From the Organizer
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
73°
Typical Low
52°
Chance of Rain
41%
Based on US Climate Normals data from Rockford Gtr Rockford Ap, 10 mi from the venue.
Host City
Population
3,742
as of 2023
City Elevation
725 ft
Nearest Airport
RFD
Chicago Rockford International Airport · 10 mi
Major Hub
ORD
Chicago O'Hare International Airport · 71 mi
Time Zone
Central Time
From Endurance Grid
A small town race. Lodging near the start could be limited, so book early.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at Frontline OCR, put it on the calendar, and turn “someday” into a start date.
258
Days to train
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From Endurance Grid
This race spans more than one sport — here’s a guide to each, so you can understand what’s involved and decide if it’s the right fit. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
Obstacle course races (OCR) combine running over different terrain with a series of physical obstacles — walls, rope climbs, monkey bars, carries, and crawls. The barrier to entry is lower than it looks.
Covering a distance on foot under a weighted rucksack — from timed solo challenges to longer team events.
Coming Up
Frontline OCR
May 22, 2027