Sat, Jan 23, 2027

Cabin Fever Winter Running Series

O'Fallon, IL

Registration open
5 Miles4 Miles5K3 Miles

Entry is $20 now and rises to $25 after Jan 17, 2027, so registering before then saves $5.

Register Results

About the Cabin Fever Winter Running Series

This is a multi-race winter series that moves between parks across the area, so each race has a different setting underfoot. The idea is to keep people running through the coldest stretch of the year rather than waiting for spring. Distances vary from race to race, and each stop is at a different park.

Runners can enter the full series or pick individual races. Series participants earn age-group points across all races, with awards going to the top finishers in each group at the end. You must complete every race in the series to be eligible for those standings, so it rewards consistency as much as speed.

Free race emails

Get the Weekly RunSesh

Get races near O'Fallon in your inbox. Every Monday we send the races coming up, and every Thursday we send the ones happening that weekend.

Two helpful emails per week. No spam. Unsubscribe anytime.

Distances & Start Times

Cabin Fever Winter Series1/23/2027 08:30$80
5 Miles1/23/2027 08:30$20
4 Miles1/30/2027 08:30$20
5K2/6/2027 08:30$20
3 Miles2/27/2027 08:30$20

Going for a Time?

Set a goal and get a pace band: every mile split on a card sized for your phone lock screen, so race morning needs no math.

Not sure what to aim for? The 5K pace chart lists the pace for every finish time.

Plan Your Trip

Where to Stay

Traveling for this race? The map shows hotels and rentals in and around O'Fallon — pan or zoom to compare what's nearby.

The map is provided by Stay22. If you book through it, RunSesh may earn a commission at no extra cost to you — it never affects the races we list.

Share Your Card

We made you a ready-to-post image. Story fits Instagram and TikTok Stories; Post fits the feed. Download it, post it, and tag @runsesh so we can cheer you on.

Preview of your share card

Want more races like this delivered straight to your inbox?

Free race emails

Get the Weekly RunSesh

Get races near O'Fallon in your inbox. Every Monday we send the races coming up, and every Thursday we send the ones happening that weekend.

Two helpful emails per week. No spam. Unsubscribe anytime.