Scatter Lake is a 8.8 mile out and back trail located near Twisp, WA and is only recommended for very experienced adventurers. The trail is primarily used for hiking and is accessible from July until October.
Trail to the lake is in good shape. After starting on the trail take the second right to Scatter Lake, the first right is Slate Creek. Good camping spots just off the lake shore. Lots of larch trees. If you decide to take on Abernathy Peak, it is about .8 mile scramble and another 1300 ft elevation gain. There is a faint boot path to the to the left once you reach the saddle. The views of the surrounding peaks from the top are amazing.
It is a remarkable trail, relatively free of horse traffic, and, in fact, horse traffic is restricted around the lake. There are nice camp spots. The trail up goes through the zones from Ponderosa pine to small tamarack, and the trail becomes quite steep in the last 1/2 mile. The climb up to Abernathy Peak from the lake is not difficult, and one achieves fine views of the Pasayten Wilderness and the North Cascades.