Well you could go riding in the Honda trails... wait that got closed down.
You could go tubing or water skiing at spotted eagle... wait that got closed down.
You could go riding at the spotted eagle riding area... wait that got closed down.
You could go to the skating rink... wait that closed years ago.
Hmm guess I ran out of ideas of fun things I did around here when I was your age.
You could go to the skate park... wait we won't build one of those skaters are evil and it costs money something this community is never willing to give up.
Or you could go to our substandard theater with terrible seating and up until recently terrible sound. The sound has been fixed somewhat but for topnotch movie viewing try Forsyth. They also have an indoor pool.
But in all seriousness if you like to fish we have miles of river at our front door. You can fish along the dike, behind the water treatment plant, Mathews recreation area, Fort Keogh with permission, Tongue River, 12 mile and lots of other places I am probably forgetting. As for hunting your just going to have to form relationships with landowners in the area or know someone with those relationships already formed. There are quite a few prairie dog towns around and coyotes, pretty much everyone will let you shoot those. You could also try paintball, hunting people is always fun
As for non sport related stuff there isn't much for teens in the area unless your creative on your own.