Leigh Fazzina, 36, was competing in a mini-triathlon in Connecticut when she took a wrong turn and got lost in a 300-acre wood.
As she raced downhill to try to rejoin the race, her front wheel hit a tree root and she crashed to the ground.
Unable to move, Leigh said she shouted for help but her fellow competitors were too far away to hear her screams.
After an unsuccessful attempt at trying to call a relative on her mobile, Leigh then tried to get her Twitter followers to come to her aid.
“I’ve had a serious injury and NEED Help! Can someone please call Winding Trails in Farmington, Conn. tell them I’m stuck bike crash in woods,” she tweeted.
See video from the aftermath of the rescue below: