KRDO-TV reported Wednesday that the bicyclists were recently riding across a bridge on the Rock Island Trail when their bikes hit a trip line.
The Colorado Springs-based Trails and Open Space Coalition says a taut line was strung across the bridge, causing the cyclists to flip off their bikes.
The organization says one of the cyclists was hospitalized with a concussion, broken clavicle and cracked ribs. The other cyclist suffered minor injuries.
Colorado Springs police are investigating.