The Williams Lake Mustangs are a Junior 'A' ice hockey team based in Williams Lake, British Columbia. They are set to compete in the Interior Division in the British Columbia Hockey Conference (BCHC) beginning in the 2026–27 season after playing in the Kootenay International Junior Hockey League (KIJHL). The team relocated to Williams Lake in 2024 from Summerland where they played as the Summerland Steam from 2011 to 2024.

The Summerland Steam debuted as an expansion team in the 2011–12 season of the KIJHL. The town of Summerland previously had a franchise in the KIJHL, called the Summerland Sting, which relocated to Penticton for the 2009-10 KIJHL season, only two seasons before the Steam were founded. In the 1980s, the town was home to the Summerland Buckaroos, a Junior A team in the British Columbia Hockey League. The Buckaroos only lasted five seasons due to continuous losing records. The team had its best post-season run in following the 2015-16 season, winning their division before being defeated by the 100 Mile House Wranglers in the league semi-finals.

The team relocated to Williams Lake in March 2024 and was renamed the Williams Lake Mustangs.

On April 20, 2026, the Mustangs were named as one of 22 teams joining the BCHC, leaving the KIJHL with the remaining 12 teams.

Note: GP = Games played, W = Wins, L = Losses, T = Ties, OTL = Overtime Losses, PTS = Points, GF = Goals for, GA = Goals against