The Belwood Dolphins swim team is comprised of children, ages 5 to 18, living in and around the Belwood neighborhood of Los Gatos, California.  Sandy Mahin and her friend, Rosemary Frame, started the Belwood Dolphins Swim Team in 1969. They both worked at the pool and coached. The team soon joined the Junipero Serra Swim League, which also included: Saratoga Woods Courtside, Laurelwood and Brookside.

Belwood has been part of the Valley Cabana Swim League since 1999. The other teams in the league include: Almaden Country Club, Los Paseos Aquatic Club, Montevideo, Oaktree Park Swim Team and Silver Creek Country Club.