Field trip: Winter Hiking Series: I-90 Alley
Winter Hiking Series: I-90 Alley March Hikes - Grand Prospect
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, Mar 21, 2026
- Tacoma Hiking & Backpacking Committee
- Day Hiking
- Adults
- Moderate, Strenuous
- Moderate
- Mileage: 8.0 mi
- Elevation Gain: 2,000 ft
- Pace: 1.8-2.2 mph
- 6 (6 capacity)
- FULL (2 capacity)
- Mon, Feb 16, 2026 at 8:00 AM
- Thu, Mar 19, 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 Grand Prospect via Rattlesnake Mountain trail. Expect a lot more solitude on this approach and enjoy views of the Snoqualmie Valley, Mount Si, Mount Teneriffe, North Bend, and more. The views are some of the best in the Cascade foothills and the trail can be hiked year-round, though it can be snowy in winter and can be muddy/slippery in patches after a good rain. Bring layers as the weather/temp can change quickly.
After brief introductions at the trailhead, we will hike the Rattlesnake Mountain trail. Once we reach Grand Prospect, we will take a 20-minute break. 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 Rattlesnake Mountain Trail TH at 8:30AM. Discover Pass required.
Required Equipment
10 essentials PLUS Microspikes.