Foss Peak via Unicorn Peak and Pinnacle Peak Trail

Starting your adventure near Lewis County, Washington, the Foss Peak via Unicorn Peak and Pinnacle Peak Trail offers a challenging yet rewarding loop trail that spans approximately 12 km (7.5 miles) with an elevation gain of around 1000 meters (3280 feet). This trail is rated as medium difficulty, making it suitable for hikers with some experience and a good level of fitness.

Getting There

To reach the trailhead, you can drive or use public transportation. If driving, head towards the nearest significant landmark, which is the Nisqually Entrance of Mount Rainier National Park. From there, follow the signs to the Snow Lake Trailhead parking area. For those using public transport, the nearest major city is Seattle. From Seattle, you can take a bus or train to Ashford, WA, and then a local taxi or shuttle service to the trailhead.

Trail Overview

The trail begins at the Snow Lake Trailhead, where you will start your ascent through dense forest. The initial part of the trail is relatively gentle, allowing you to warm up as you navigate through towering trees and lush undergrowth. After about 2 km (1.2 miles), you will reach a fork; take the left path to continue towards Unicorn Peak.

Unicorn Peak

As you approach Unicorn Peak, the trail becomes steeper and more rugged. This section involves some scrambling, so be prepared with appropriate footwear and possibly trekking poles. The climb to Unicorn Peak offers stunning views of the surrounding valleys and distant peaks. At approximately 4 km (2.5 miles) into the hike, you will reach the summit of Unicorn Peak, standing at an elevation of around 2080 meters (6824 feet). Here, you can take a moment to enjoy panoramic views and perhaps spot some local wildlife, such as marmots and mountain goats.

Pinnacle Peak

From Unicorn Peak, the trail descends slightly before ascending again towards Pinnacle Peak. This section is less strenuous but still requires careful footing. Pinnacle Peak is located about 6 km (3.7 miles) from the trailhead and offers another excellent vantage point. The elevation here is slightly lower than Unicorn Peak, but the views are equally breathtaking. Look out for alpine meadows filled with wildflowers during the summer months.

Foss Peak

Continuing on, the trail leads you towards Foss Peak. This part of the hike is less traveled and offers a sense of solitude. The trail here is narrow and can be overgrown in places, so keep an eye on your navigation tools, such as HiiKER, to stay on track. Foss Peak is the final summit on this loop, located around 8 km (5 miles) from the start. The elevation gain to Foss Peak is more gradual, making it a pleasant end to the series of climbs.

Descent and Return

The descent from Foss Peak takes you through a series of switchbacks that lead back into the forest. This section can be slippery, especially after rain, so take your time. The trail eventually loops back to the initial fork, where you will retrace your steps for the final 2 km (1.2 miles) back to the Snow Lake Trailhead.

Historical Significance

The region around Mount Rainier has a rich history, with the mountain itself being a sacred site for the indigenous tribes of the Pacific Northwest. The area was first explored by European settlers in the 19th century, and the trails you hike today were originally used by these early explorers and miners. The diverse ecosystems you pass through are a testament to the area's natural history, shaped by volcanic activity and glacial movements over millennia.

Wildlife and Flora

Throughout your hike, keep an eye out for the diverse wildlife that inhabits the region. Black bears, deer, and various bird species are commonly seen. The flora is equally impressive, with old-growth forests, alpine meadows, and a variety of wildflowers depending on the season.

This trail offers a comprehensive experience of the natural beauty and historical significance of the Mount Rainier area, making it a must-do for any avid hiker.