The Battle of Olómpali was fought on June 24, 1846, between a rebel group supporting an independent California Republic and a Mexican army force under the command of Joaquín de la Torre.

Near Olómpali (north of present-day Novato) they met up with a militia group that had set out from Sonoma in hopes of rescuing two rebels who had been captured and, as they had learned the previous day, killed.

On about June 16, William Todd was dispatched from Sonoma to Bodega Bay with an unnamed companion to obtain gunpowder from American settlers in that area.

Ford also learned that William Todd and his companion had been captured by the Californio irregulars led by Juan Padilla and José Ramón Carrillo.

Militiamen from south of the Bay, led by Mexican Captain Joaquin de la Torre, had joined with Padilla's irregulars and now numbered about seventy.