50k Mashup Slam
Crystal Lake, United States • 10 Jan 2026
Event
The 50K MASHUP SLAM is a trail running series entry listed for Crystal Lake, IL on January 10, 2026. It is part of a series of 50K and related trail events held across the Midwest. The series includes at least one 50-kilometer distance and a 53K event listed among its races.
Series details
The series runs through the calendar year, beginning with the Frozen Gnome 50K in January and concluding in November with the Miner 49'er 50K. Other events listed in the series include Clinton Lake 50K (March), Ozark Foothills 50K (April), Ice Age 50K (May), Dark 2 Dawn - 9 Hours (June), Rockin Rockwoods 53K (September) and G.O.A.T.z 50K (October). Awards for the series are based on cumulative finish times, with awards given to the top three finishers and finisher buckles and awards presented at the final event in the series.
Registration and rules
Participants who register for the 50K MASHUP receive a special pricing code by email to apply when registering for each race in the series. Registration for the series is non-refundable. Those registered for the series by specified deadlines may receive priority or pre-registration opportunities for certain individual races; the first 25 series registrants by December 1, 2025, are offered a guaranteed spot in the Clinton Lake 50K for 2026, and pre-registration access for the Ice Age 50K is noted for series registrants by that date. Participants remain responsible for individual race registrations and fees. Visit the organization's website for the most recent information.