Lost Lake and Interurban Trail Loop

The terrain on this loop is quite varied. The Interurban Trail section is generally well-maintained, relatively flat, and follows an old railroad grade, with surfaces ranging from pavement to gravel and dirt. However, as you transition to the North Lost Lake Trail and especially the Fragrance Lake Trail, the terrain becomes significantly more rugged. Expect substantial elevation gain, including steep switchbacks, and unpaved surfaces that require a touring bicycle capable of handling mountain trail conditions.

The Lost Lake and Interurban Trail Loop is rated as 'difficult' for touring cycling. While the Interurban Trail portion is accessible for many skill levels, the sections around Lost Lake and Fragrance Lake involve significant elevation gain and rugged, unpaved terrain with steep switchbacks. Beginners might find these sections very challenging. It's best suited for cyclists with experience on mountain trails and a good level of fitness.

The loop is approximately 20.3 kilometers (12.6 miles) long with over 570 meters (1,870 feet) of elevation gain. On average, it takes about 2 hours and 17 minutes to complete by touring bicycle. However, this can vary significantly based on your fitness level, the type of bicycle, and how often you stop to enjoy the scenery.

You can typically find parking at Larrabee State Park, which provides access to the Interurban Trail and other connecting routes that form this loop. Specific trailhead parking areas within the park or along the Interurban Trail are good starting points.

The loop offers diverse and beautiful scenery. The Interurban Trail provides views of the San Juan Islands and Chuckanut Bay. As you climb towards Lost Lake and Fragrance Lake, you'll pass through dense forests of Douglas fir and western red cedar. Lost Lake itself is a serene spot, and higher elevations on the Fragrance Lake Trail can offer stunning panoramic views of the surrounding landscape, including glimpses of the San Juan Islands on clear days. You might also see recovering forests, waterfalls, and vibrant fall colors.

Yes, a notable highlight is the Arroyo Nature Reserve. The Interurban Trail itself is historically significant, following the route of the old Interurban Trolley. The blend of easy historical paths and challenging mountain trails, the tranquil Lost Lake, and the panoramic views from higher elevations are all significant features of this route.

Generally, dogs are allowed on trails within Larrabee State Park and the Interurban Trail, but they must be kept on a leash. Always check specific signage at trailheads for any updated regulations or restrictions, especially in sensitive natural areas.

Yes, since much of this loop is within Larrabee State Park, which is part of the Chuckanut Mountain Park area, you will likely need a Discover Pass for parking. The Discover Pass is required for vehicle access to state parks and other state recreation lands in Washington. You can purchase one online or at various vendors.

The best time to cycle this loop is typically from late spring through early fall (May to October) when the weather is drier and temperatures are mild. During these months, the trails are less muddy, and the views are often clearer. Fall offers beautiful foliage. Winter can bring rain, mud, and potentially snow at higher elevations, making the more rugged sections very challenging.

Yes, the route utilizes and intersects with several other trails. Besides the prominent Interurban Trail, North Lost Lake Trail, and Fragrance Lake Trail, you'll also encounter sections of the BR5 Coast Millennium Route, South Lost Lake Trail, Ridge Trail, and various smaller paths like Double Down, Hush Hush Trail, and Madrona Trail.

While the loop can be ridden in either direction, some cyclists prefer to tackle the steeper, more challenging climbs of the Fragrance Lake Trail section first, getting the significant elevation gain out of the way early. This would typically mean riding the Interurban Trail section first, then ascending towards Lost Lake and Fragrance Lake. Riding it this way can make the latter part of your journey feel more downhill and less strenuous.