Finally found this lake and it's a really nice place! Unfortunately, this is another good opportunity for a Cache In Trash Out outing. So bring a good-sized garbage bag. Looks like a spot to fish as well. Walk in is very easy on a flat road/trail. I imagine it could be slippery if icy so the terrain is set at 2. Cache is a .30 Cal ammo box and is hidden pretty well. Cache is just a few feet off a path. Refer to the hint if you need to as the area is sensitive.
Update: you now need either a motorized or non-motorized permit to access this area. Click on the link below and go to the FAQ tab for more information. Thanks! It's like 8 bucks for a day use non-motorized permit or 50 bucks for a yearly one. Motorized are way more expensive and not required for my caches.
Campbell Global: Snoqualmie Forest