When are most 5K races held in Crystal Lake?
April is the busiest month for 5K races in Crystal Lake, with 2 of the 3. If you are flexible on the date, that is the quickest way to narrow things down.
Illinois · 5K
2026-2027 5K Races in Crystal Lake, Illinois
Every upcoming 5K around Crystal Lake, with start times, entry fees, finish-time stats from past editions, start-line maps, and the local run clubs to train with.
3 upcoming 5K races found
By the numbers
The Biggest and Longest-Running
The Crystal Lake races that stand out on the numbers: the biggest field, and the longest unbroken run of editions.
How we calculate these stats: RunSesh calculates these figures from the most recent published results of past editions, sourced from RunSignup. We show aggregates only: field size, winning and median times, and the cutoff. We never publish individual finisher tables. Last updated Nov 12, 2026.
Common Questions About Running a 5K in Crystal Lake
Where can I train for a 5K in Crystal Lake?
Browse Crystal Lake run clubs on RunSesh to find a training group at your pace.