San Juan Island National Historical Park · Washington

Old Military Road Trail

0.2 mi of trail, end to end · 20 ft of descent · 133 ft–157 ft · hiking

Visitor centers

157 ft 133 ft · 0.2 mi high 157 ft

Along the way Visitor Center

Hike the Old Military Road Trail the Park Service's write-up

dogs allowed

Two hikers along a gravel path
Hiking the Old Military Road Trail allows you to hike through history

The Old Military Road Trail (also known and more often signed as “The American Camp Trail”) is a 1 mile trail that takes visitors from the American Camp Visitor Center to the Frazer Homestead Preserve. It passes through forests and wetlands where deer and foxes live. The trail continues another 5 miles beyond the Frazer Homestead Preserve, ending in the town of Friday Harbor. The route is only partially off-trail, with hikers routed onto Cattle Point Road and Golf Course Road for a significant portion of the trail. At the end of the golf course, the trail crosses the road and continues next to the Friday Harbor Airport, allowing excellent opportunities to watch planes take off and land. The Old Military Road has a storied history.

The first formal roads on San Juan Island were built by the Hudson’s Bay Company, primarily utilizing contract laborers from the Cowichan Tribe, to connect a series of sheep runs on this island operated by their subsidiary, The Belle Vue Sheep Farm. The Old Military Road utilized and improved upon that road network to create a route that connected American Camp and English Camp during the Joint Occupation of San Juan Island (1860-1872). This route allowed the commanders of both militaries to communicate quickly and resolve disputes that emerged during the Joint Occupation. Towards the end of the Joint Occupation, a telegraph line was laid to provide even quicker communication, demonstrating the importance of the Old Military Road in helping to keep the peace on San Juan Island. As you walk this trail, you will follow in the historic footsteps of the many groups of people who made the Old Military Road possible.

Accessibility The trail is 0.6 miles in the American Camp section, however the trail continues longer outside of the park. It is an unpaved trail that crosses Cattle Point Road and includes 88 feet of elevation gain.

This hike on nps.gov

All 20 trails in San Juan Island National Historical ParkFind a trailOn the parks mapPark on nps.gov

About this trail's facts

The lines are the National Park Service's public trails layer, the trailheads and the waterfalls, views, peaks and historic places along them the Service's public points of interest, read 2026-10-16 and simplified for the map; the length is the line's, end to end. The write-ups are the Service's own "things to do" text, unedited. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the park's own site before you go.