The best time for the hike on Kelcema Lake Trail is reported by the national forest service to be in the summer or fall. This is then likely the time the trail has "heavy usage".
To get to the trail head, drive east on the Mountain Loop Highway 12.5 miles from the Verlot Public Service Center (11 miles east of Granite Falls) until you get to Deer Creek Road #4052 on the left. The trailhead is 4.2 miles down this road.
The Kelcema Lake Trail is a short, easy hike for people just wanting to get away for a part of the day. The hike is short enough that fishermen have easy portage for small boats, rubber rafts, and their gear. The lake is 23 acres and this is where there are fish to be found (so check with your local fishing outfitters for specifics).
The area around the lake is sub-alpine, with trees and brush and even huckleberries (late summer / early fall).
When researching this trail, it is interesting to note that the lake lies within the Boulder River Wilderness.
Up at Deer Creek Pass you're met with great views of Three Fingers and other nearby peaks.
Here's a good hike to consider bringing the kids, just as long as they don't disturb anyone who's fishing!