Tomales Bay on a Quiet Summer Day. Tomales Bay is a body of water which penetrates the coast near the northern boundary of the county, extending in a southeasterly direction for about fifteen miles. It is a landlocked harbor, averaging about a mile in width with a depth of about ten feet of water on the bar. On its western shore is located Inverness, the favorite summer resort, almost hidden in the wooded canyons. On its Eastern shore are the towns of Marshall and Hamlet, with their numerous picturesque clam digging camps, and near its head are the towns of Pt. Reyes Station and Olema. [Tracks. Northwestern Pacific Railroad.]