Rattlesnake Mountain - Grand Prospect
Snoqualmie Region
As of March 15, 2026, Rattlesnake Mountain to Grand Prospect is snow-covered, becoming deep and soft near the summit, with post-holing likely. Lower sections had icy conditions on March 15, transitioning to packed snow. Traction devices may be useful for descents as temperatures warm. The parking lot had snow and ice but is manageable. A few small downed trees are present. Reports from January and February noted blowdowns east of Grand Prospect due to logging, making that section difficult and potentially hazardous, with some recommending avoiding it. Access roads are suitable for all vehicles.
generated from 39 reports
Conditions at a Glance
Trail
Minor obstacles posing few problems
3 of 4
Snow
Trail snow-covered at times - gear and expertise recommended
2 of 4
Road
Road suitable for all vehicles
4 of 4
Bugs
No bugs
4 of 4
Sources
TL:DR - The trail is almost completely snow covered up to Grand Prospect, icy down low, packed snow on trail in the middle, and soft and deep near the top, easy to post-hole there. A few small trees ...
My group of 6 people attempted to hike to Grand Prospect but had to turn around approximately 1 mile from Grand Prospect due to deep snow. The trail started out fine (snow was present but it was hard...
It wasn't looking like we'd remain very dry at the beginning but it turned out to be a really nice day. I had a memory of a much different trail 25 years ago so I was pleasantly surprised by the chang...
At 8:00 in the morning, the trail head parking lot was icy and we had light snow falling. The trail was mostly covered with snow, increasing in depth up to the benches; maybe 6 inches up there. It con...
Confirming a late January report about a lot of blowdowns east of Grand Prospect after logging activity. Some were easily avoided but some we had to crawl Under and take off packs. The ridge part of t...
9 of us met at the West Rattlesnake Mountain trailhead at 7:30 for a 7:43 start. We were greeted on the road by a stunningly beautiful sunrise, purples and pinks, and had no rain on the day.A Discover...
This trail is so well maintained, including a new bridge crossing the creek. A beautiful, cold, blue sky day hike! The only snow was @ Grand Prospect, hard packed and a bit slippery.
Muddy. Few trees down.
Left some red hiking poles on the trail today, 12/29. It seems like someone picked them up as they were not where I’d left them. Please reach out if you have them: lindsey.mcc.clark@gmail.com
Very much enjoyed this hike on the way up. A gentle grade, and clear signage, it is worth noting that it intersects with a trail for mountain biking a number of times, don’t veer down the wrong path,...
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