She began playing softball at age seven and studied at Simon Fraser University.

Cumpstone also competed in ringette at the 1999 Canada Winter Games and eventually played for one of the first teams in the National Ringette League (NRL), the Saskatoon Wild.

As of 2023, she is head coach of the Saskatchewan Heat, a ringette team in NRL.

In her spare time, she also coaches the Ice Wolves, the 2024/25 Saskatoon children's Fundamental 2 ringette team.

This biographical article relating to a Canadian softball figure is a stub.