Great Western Half-Marathon & 10K

Join Strong As Oak and Varsity Rush at Oakhurst Forest Preserve in Aurora on Dec 6, 2025 for 5K and 10K trail races plus kids events on mixed terrain. Hilly course, varied surfaces and finisher medals for all.

Run winter single track in Crystal Lake at the Frozen Gnome on Jan 10, a Triple Black Diamond loop through Veteran Acres. Choose 50K, 10K or 50K relays for teams of 2 or 5 and warm up at the Gnome Depot with hot food and coffee.

Take on the 50K MASHUP SLAM, a Midwest trail series that spans eight scenic events and rewards runners who finish five races with a special finisher buckle. Top series placers earn awards at the final G.O.A.T.z or Miner 49'er event.

Kick off winter in Batavia with the Fox Valley Winter Challenge 5K, a scenic trail run across prairie, grass, and limestone that may feature snow or mud. It is the first of a three race series with connectable medals and winter swag.