Calvin’s Challenge 100 mile
Springfield, OH Springfiled3 categories; drafting starts at 11am. Non-drafting starts at 1200pm. Team drafting teams of 2-8 riders starts at 11am. https://www.bikereg.com/calvins-challenge-2025
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All Day
Calvin’s Challenge 24 hour
Springfield, OH Springfiled3 categories; Drafting starts at 0710. Non-drafting (RAAM Qualifier) starts at 0710. 24-hour team drafting. Teams of 2-8 riders. Age group, Gender, bike type awards. https://www.bikereg.com/calvins-challenge-2025
