Bass Lake and Dry Lake in the Superior National Forest are located just north of Ely, Minnesota. The trailhead parking lot has restrooms available.
My brother's family has younger children and opted to hike just to Dry Falls which is 1 mile each way and that portion of the trail is an easier hike. The waterfall has a "bathtub" area that you can swim in and we saw many people jump off the falls and swim in the lake below.