Her grandmother began running in her 50s and has completed several ultra-marathons .
Crouch comes from a family of talented runners -- her mom became an elite masters runner at the age of 42 , posting a 2 : 49 marathon .
mom 's grandmother began running in her 50s and has completed several ultra-marathons .
Crouch comes from a family of talented runners -- her mom became an elite masters runner at the age of 42 , posting a 2 : 49 marathon .