pump track
n.— «A pump track is a small, roughly circular track that has a series of small jumps and rollers that require not only skill and timing, but also tremendous anaerobic and aerobic fitness.» —“SRAM’s Dirt Jump Contest, Force group, Ride Zone and Industry Cup highlight Sea Otter” VeloNews Mar. 16, 2006. (source: Double-Tongued Dictionary)
Further reading
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