Checkpoints are at convenience stores , and convenience stores are on the route , but the riders must use their own judgment to resupply or not .
Riders often do not have time for anything other than a quick stop to refuel or exchange clothing layers .
Checkpoints are at convenience stores , and convenience stores are on the route , but the riders must use Riders ' own judgment to resupply or not .
Riders often do not have time for anything other than a quick stop to refuel or exchange clothing layers .