Mineral Creek Trail is a 9.4 mile lightly trafficked out and back trail located near Roslyn, WA that features a lake and is rated as difficult. The trail is primarily used for hiking, camping, and backpacking and is accessible from July until October. Dogs are also able to use this trail.
Mineral Creek trail follows Mineral creek up to Park Lake, with access to the Pacific Crest Trail.
The trail is overgrown. Bring rain gear so as not to get your clothes soaked. Waterproof pants are necessary if you don't want the water to seep into your boots getting your socks soggy. This is a much different type of hiking for Washington. Watch your footing as you make your way through all the brush. This is definitely a challenge of a trail. There are loads and loads of wild raspberries though!
Fairly easy hike, slight grade up all the way until the end with about .5-1 mile of steep at the end. The trail has been cleared of brush about halfway, and is still fairly thick about mile 2.5-4. Definitely doable, just not the best trail to hike. As Adam said, it is a means to an end. Definitely worth the effort once you get to the lake. And if you go about 1 mile further past the lakes, you get an incredible view of Glacier Lake, Spectacle Lake, and Mt. Stuart in the distance. This is where I would go for a lunch break. The views from this vantage point definitely make you want to keep going... until you realize that you already have 6 miles to go to get back to the pickup.
Mineral Creek trail is a means to an end, providing access to Park Lakes and the Pacific Crest Trail. Steep in parts, muddy, and overgrown, this trail can be unpleasant, but it does bring you to a very nice section of the PCT.