Tolt Pipeline and Sammamish River Trail Loop

This loop offers a striking contrast in terrain. The Tolt Pipeline Trail section is mostly unpaved, featuring gravel, dirt, and sand, with significant and steep climbs (up to 22%). In contrast, the Sammamish River Trail is a paved, multi-use path that is largely flat and smooth.

The overall loop is considered moderate to hard. While the Sammamish River Trail section is easy and suitable for all skill levels, the Tolt Pipeline Trail demands good to very good fitness due to its steep, unpaved climbs. Beginners might find the Tolt Pipeline section very challenging, potentially requiring them to walk their bike on some hills.

The loop can be enjoyed year-round, but spring and fall offer pleasant temperatures and vibrant scenery. Summer provides clear views, though the unshaded sections of the Tolt Pipeline Trail can be very exposed. Winter cycling is possible, but be prepared for potentially muddy or icy conditions on the unpaved sections.

There are several parking options available. You can typically find parking near access points for both the Sammamish River Trail and the Tolt Pipeline Trail. Common starting points include parks along the Sammamish River or access points in Redmond and Woodinville. Specific parking availability can vary, so it's good to check local park websites for the most current information.

Yes, dogs are generally allowed on both trails. However, they must be kept on a leash at all times. Please remember to clean up after your pet to help keep the trails enjoyable for everyone.

Generally, there are no specific permits or entrance fees required to access the Tolt Pipeline Trail or the Sammamish River Trail. If you are accessing parts of the loop that pass through the Redmond Watershed Preserve, standard park rules apply, but typically no fees are needed for trail use.

The loop offers diverse scenery. The Sammamish River Trail provides tranquil views of the river valley, agricultural areas, and passes by local wineries. The Tolt Pipeline Trail, being elevated, offers expansive vistas of the Olympic Mountains to the west and the Cascade Mountains to the east on clear days, alongside forested sections, upscale neighborhoods, and horse farms.

Key highlights include the Tolt Pipeline Trail itself, known for its challenging climbs and panoramic views, and the peaceful Sammamish River Trail. You'll also pass through sections of the Forest Trail in Redmond Watershed Preserve, and potentially near wineries in Woodinville and Sixty Acres Park.

Yes, the route connects with several other trails. It links to the Burke-Gilman Trail and potentially the Snoqualmie Valley Trail. Along the route, you'll also find sections of the PSE Trail, Pipeline Regional Trail, and Woodinville Valley Trail.

Yes, especially along the Sammamish River Trail section, you'll find opportunities for refreshments. The trail passes through or near Woodinville, which is known for its wineries and has cafes and restaurants. The more remote Tolt Pipeline Trail section has fewer direct amenities, so it's wise to carry sufficient water and snacks.

For a slightly less strenuous experience, consider cycling the loop clockwise. This approach tackles the steepest climbs of the Tolt Pipeline Trail earlier in your ride, often allowing for a more gradual descent back towards the Sammamish River Trail. Be prepared for the infamous 'Heart Attack Hill' regardless of direction!