The Annual Old Grove Festival takes place at the historic Redwood Forest Theater in Armstrong Redwoods SNR in September. This beautiful open-air theatre was built in the 1930s. Concerts and theatrical events took place there for decades until the theater was closed in the 1980s out of concern for natural resource protection.In 2006, the theater was reopened for limited use by Stewards of the Coast and Redwoods (Stewards) and California State Parks. Event reservations are limited to alleviate environmental impacts and due to parking limitations.

The Old Grove Festival features an outstanding variety of musical and theatrical productions that help Stewards raise funds to support their educational and stewardship programs, as well as continued advocacy for all State Parks.