a track consisting of turns and small hills that is designed to be used by people on mountain bikes (= bicycles with thick tyres originally designed to be ridden on hills and rough ground ), skateboards (= narrow flat boards with wheels underneath), etc.

Pump tracks can be ridden using a bike, scooter, skateboard and even wheelchairs.

Pump tracks are designed to maximize your momentum, so you can ride it with minimal pedalling. 山地自行车赛道旨在最大程度地利用人的动量，因此可以用最小的踏力在上面骑行。