Calvins Challenge 2027
📍 Springfield, OH
🚴 Event Overview
The Calvins Challenge Event for 2027 - May 15-16 I am very excited to announce that the Calvins Challenge event is back again in 2027 after being an ever greater success in 2026. We are also incredibly fortunate enough to have it at the same Shawnee High School location! The format for the 100 mile, 6-hr, 12-hr and 24-hr events will be the same as 2026 - utilizing a long and short loop! There will be drafting,...
🗺️ Interactive Route Map & Elevation Profile (Ride with GPS)
3 Verified GPS RoutesScrub along the interactive elevation graph below to inspect climb gradients, mile markers, and course topography, or export the GPS track directly to your cycling computer.
📍 Event Map & Location
⚡ Event Specifications & Schedule
Verified logistical details, course specs, and event attributes for riders and participants.
| Dataset Population | 2027 Forward Calendar Active forward calendar entry for rider scheduling; isolated from the 2026 Census baseline count. Methodology → |
| Qualified Distances | 🏔️ Imperial Century (100 mi)⚡ Half Century (50 mi)🔥 Double Century (200K+)🗺️ RWGPS Map (3) |
| Event Type | Cycling Century |
| Sport | Road Cycling |
| Event Name | Calvins Challenge 2027 |
| Event Status | Scheduled |
| Attendance | In-Person (Offline) |
| Start Date | 📅 May 15 – 16, 2027 |
| RWGPS Routes | |
| End Date | 2027-05-16 |
| Street Address | 1675 E Possum Rd |
| City / Locality | Springfield |
| State / Region | OH |
| Postal / Zip | 45502 |
| GPS Coordinates | 39.870089, -83.781152 |
| Host / Organizer | UltraCycling Events ↗ |
| Registration Fee | $45 - $150 |
| Registration Link | Official Registration ↗ |