Mount Si and Mount Teneriffe Loop

Parking for the Mount Si and Mount Teneriffe Loop is typically available at the Mount Si Trailhead or the Teneriffe Falls Trailhead. Arriving early, especially on weekends, is highly recommended as these are popular areas and parking lots can fill up quickly.

Yes, dogs are generally allowed on the trails within the Mount Si Natural Resources Conservation Area. However, they must be kept on a leash at all times. Please remember to pack out all pet waste.

The best time to hike the Mount Si and Mount Teneriffe Loop is typically from late spring through early fall (May to October). During these months, you'll find more favorable weather conditions and less snow at higher elevations. Winter hikes are possible but require appropriate gear like microspikes or gaiters due to snow and ice.

Yes, a Discover Pass is required for parking at trailheads within the Mount Si Natural Resources Conservation Area. You can purchase a day pass or an annual pass online or at various vendors.

Expect a very strenuous and varied terrain. The loop features significant elevation gain over rocky paths, forest trails, and some sections that are road-to-trail conversions. Near the Base of Haystack Scramble on Mount Si, you'll encounter sections requiring careful footing and scrambling. The Mount Teneriffe side often has lush, old-growth forests.

The loop offers expansive views of Mount Rainier, the Puget Sound, and Mount Baker. Key viewpoints include the Mount Si Viewpoint and the summit of Mount Teneriffe, which many hikers consider to offer superior 360-degree vistas. You'll also pass by Teneriffe Falls and enjoy lush old-growth forests.

Yes, the route incorporates sections of several trails. You'll hike along parts of the Mount Teneriffe Trail, Mount Si Trail, Teneriffe Falls Trail, Kamikaze Trail, Talus Loop Trail, and the Si–Teneriffe Connector Trail, among others.

No, this loop is generally considered difficult to very strenuous due to its significant mileage (over 15 miles) and substantial elevation gain (over 5,900 feet). It is not recommended for beginners or families with young children, as it requires a high level of fitness and endurance.

While Mount Si is very popular, combining it with Mount Teneriffe via connector trails often provides a more extensive and less crowded experience on the Teneriffe side. Many hikers find the views from Mount Teneriffe to be even more rewarding than those from Mount Si's main trail, offering unique perspectives of the area.

Given the length and difficulty, you should bring plenty of water (there are no reliable water sources on the trail), high-energy snacks, appropriate layers for changing weather, sturdy hiking boots, a map or GPS device (like komoot's app), and a first-aid kit. In winter, microspikes or gaiters are essential.

While the full loop is strenuous, focusing on the Mount Teneriffe side, particularly via the Mount Teneriffe Trail, can offer a quieter experience with stunning views, including the View of Mount Si from Teneriffe Falls Trail, before connecting to the more popular Mount Si trails.