Backpacking areas: https://www.fs.usda.gov/activity/ipnf/recreation/hiking/?recid=6762&actid=51
Difficult hike but worth it for the view. Take some time up there and enjoy a second hike to another lake. Enjoy the stars at night and find yourself out there.
Side note: To whoever stole our watermelon that was chilling in the lake while we camped not 20 feet away from it, I hope you enjoyed it. Someone taking the time and effort to hike up a watermelon of all things clearly didn't want to enjoy that so hats off to you and your terrible friends.
I love foing to stevens lake. My first time going there was with the kroc center and i hope i get to go again this year. It is a little bit hard of a hike but im 13 so you would be just fine. 10/10 would recomend. (Note water is really really cold eben in the middle of the summer)
If you can catch the Lakes on a hot summer day there's no better place for alpine lake swimming. I go here every few years and it never gets old.