Directions
On the far southeast corner of San Juan Island; Third Lagoon is located astride the northeast boundary of the American Camp Unit of San Juan Island National Historic Park. The Lagoon is best accessed from the National Park trailheads such as the ones serving Jakle’s Lagoon and Mt. Finlayson. Other walk-in approaches from the end of Cattle Point Road are also possible but the nearest public parking from this end is at the Cattle Point Interpretive Area (see article this website).