Girdwood Bike Trails Where to go biking in Girdwood! Bike on our paved Girdwood Bike path. Take a long journey down the Gird to Bird paved bike path. Go down hill mountain biking at Alyeska Resort. Or explore our cross-country bike trails throughout town! Need a bike to rent - rent your bikes from Powderhound! (Fat tire, cross country and downhill bikes available.)