Calvin’s Challenge 24 hour
3 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
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3 events,
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Calvin’s Challenge 12 hour
Calvin’s Challenge 12 hour
3 categories; drafting begins at 0705. Non-drafting begins at 0705. 12-hour team drafting. Teams of 2-8 riders. Age group, Gender, bike type awards. https://www.bikereg.com/calvins-challenge-2025
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Calvin’s Challenge 6 hour
Calvin’s Challenge 6 hour
3 categories; drafting begins at 0700 & non-drafting begins at 1200pm. 6-hour team drafting. Teams of 2-8 riders. Age group, Gender, bike type awards. https://www.bikereg.com/calvins-challenge-2025