The Peninsulaires Chorus competes every spring in the Northwest Division of the Far Western District of the Barbershop Harmony Society. The Divisional contest brings together the best choruses in the California counties west of the Coastal Range: Del Norte, Humboldt, Trinity, Mendocino, Lake, Sonoma, Napa, and Marin, as well as the counties of Contra Costa, Alameda, San Francisco, San Mateo, Monterey, Santa Cruz and Santa Clara. After all the Divisions have competed, the top scoring choruses within the Far Western District are awarded a berth at the Fall Far Western District Contest and Convention.

The winner of the District Fall Chorus Contest becomes the District Chorus Champion, and goes on to represent the District at the International Chorus Contest. Should they with the International Contest, they must sit out of competition for two years; otherwise they may return again to Division and District competition each year.

Likewise, the Chapter Quartets are eligible for the Division Quartet Contest, following the same path of success to International Quartet Champions. Additionally, a Novice Quartet contest is held annually for beginning quartets.

The 2016 Divisional contest will be combined with the Northeast Division, and will be at the Castro Valley Center for the Arts, Castro Valley, Calif. on April 2. The Fall District contest is scheduled for October 14-15, 2016 at the Fox Performing Arts Center, Riverside, Calif.