Ready to hike? Blue lake lies within the Indian Heaven Wilderness area of Washington. It's an expansive forested wilderness area in the Gifford Pinchot National Forest which straddles the crest of the Cascade range, with sub-alpine meadows and hundreds of lakes. To do this particular hike which weaves you through several beautiful lakes and scenic areas, begin at the Thomas Lake trailhead. Follow the trail through the regrowth and into the forest, and you'll reach the first cluster of lakes (including Thomas lake) in half a mile. You can't help but stop and admire the calm and fir-lined alpine lakes. Follow the main trail to climb about a hundred feet to reach a plateau with a view. Continue on through marshy fields as well as dense forest and pass several more lakes. In a little over 3 miles, you reach the largest lake in the Indian Heaven Wilderness; Blue lake. It's sparkling blue waters will amaze you. Camp overnight in one of the designated campsites and even fish for trout in the lake. If you want to continue hiking, this trail intersects with the Pacific Crest Trail, which leads to several other lakes and natural wonders of the area. The trail is do-able summer and fall. However, the summer brings clouds of mosquitoes, whereas fall is the end of mosquito season and beautiful fall colors are coming out. Round trip to Blue Lake and back is 6.6 miles, 700 feet in elevation gain, and an overall moderate difficulty. However, you can make the hike shorter or longer as you please. Spend a few days (or even a few hours) in the wilderness and see the majesty of Blue Lake! You'll certainly be happy you did.