Million Air Challenge

Do good, breathe easier and win great prizes! Rise to the challenge this August with our Million Air Challenge. This fun, free event aims to collectively remove 1 million pounds of CO2 from the air by logging around 1 million miles of clean commutes in just two weeks. The challenge runs from August 16, 2021 through August 27, 2021.

We can make a difference!

How to Sign Up

Join the challenge with these three easy steps:

  1. Join GCO at
  2. Sign up for the Million Air Challenge when you log in (you must indicate that you want to participate to be eligible for prizes)
  3. Log your trips for a chance to win


You could win one of our grand prizes – a pair of Apple Airpods and a $500 gift card from High Country Outfitters. You can also be entered for a chance to win additional weekly prizes by following GCO on Facebook and Instagram.