Field trip: Winter Hiking Series: I-90 Alley
Winter Hiking Series: I-90 Alley January Hikes - Little Si & Boulder Garden Loop
Trip initially open to Winter Hiking Series students. Trip will open for registration to all Mountaineers 7 to 10 days prior to the hike date.
Contacts
- Sat, Jan 24, 2026
- Tacoma Hiking & Backpacking Committee
- Day Hiking
- Adults
- Easy/Moderate, Strenuous 1, Technical 4
- Moderate
- Mileage: 5.7 mi
- Elevation Gain: 1,675 ft
- Pace: 1.8-2.2 mph
- 6 (6 capacity)
- FULL (2 capacity)
- Wed, Jan 7, 2026 at 8:00 AM
- Thu, Jan 22, 2026 at 5:00 PM
- Cancellation & Refund Policy
- iCal Google
***Trip initially open to Winter Hiking Series students. Trip will open for registration to all Mountaineers 7 to 10 days prior to the hike date.***
Join me to explore Little Si and Boulder Garden Loop. Little Si is the little sister to Mount Si. The trail is easier with less elevation, but the view from the top is just as breathtaking with views of Snoqualmie Valley and Rattlesnake Mountain.
After brief introductions at the trailhead, we will hike the Little Si trail. Along the trail we will take the detour to the Boulder Garden Loop counter-clockwise to enjoy the scenery then intersect back to the Little Si trail. We will follow the trail to the top of Little Si then take a 20-minute break at the top. We will hike slower going up and faster coming down based on the pace of the group. We will hike rain or shine, unless the weather is unsafe. Remember to bring your microspikes.
We will meet at Little Si TH at 8:30AM. Discover Pass required.
Required Equipment
Ten Essentials PLUS microspikes; trekking poles recommended