When is race season in Grayslake?
September is the busiest month for races in Grayslake, with 2 of the 3. If you are flexible on the date, that is the quickest way to narrow things down.
Illinois · Race calendar
Running Races in Grayslake, Illinois
Upcoming running races in and near Grayslake, Illinois - 5Ks, 10Ks, half marathons and more, with dates, pricing, finish-time stats, start-line maps, and local run clubs to train with.
3 upcoming races · 2 with finish-time stats
By the numbers
The Biggest and Longest-Running
The Grayslake 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 Jul 27, 2026.
Common Questions About Racing in Grayslake
How early should I register for a race in Grayslake?
2 of the 3 races in Grayslake already have a price increase scheduled, so entry gets more expensive the longer you leave it. Race pricing almost always steps up as the date approaches, and signing up early is usually the cheapest option.
Where can I train for a race in Grayslake?
Browse Grayslake run clubs on RunSesh to find a training group at your pace.