The guided walking tour covers Tumwater’s pioneer past, Olympia Brewing Company history and the annual salmon migration. Tour Information: We will once again offer these popular, free guided tours from July through mid September. The scheduled Tour dates are available below. Tours are free and limited to 30 people on a first-come, first-served basis. No reservations are taken. The tour meeting takes place outside of the Olympia Tumwater Foundation office in Tumwater Falls Park.