We didn't have a map, so distances are more in driving and walking time. To get there take the Latour Creek road from the Cataldo exit on I-90. Follow it up for about 45 minutes to the top of Rochat (pronounced Row Shay) Saddle. From there you can see Latour Baldy with a lookout and radio tours on the right. Park at the BLM site Sheep Springs, which didn't have any springs we could see, but probably would if we'd explored more. Across the road from the parking area the trail (unmarked) to Crystal Lake starts.
The hike is 2-3 miles, but took about two hours, as a lot of it is up and down and crossing talus slopes, with unstable rocks.
While there I saw this cool butterfly that when the wings are closed blends in with treebark.
Click on the photo to see how it looks with wings open. Isn't nature fun?