Overview Seven Oaks Recreation is a 7 mile loop trail located near Ames, Iowa that features a river and is rated as difficult. The trail offers a number of activity options and is accessible year-round. Dogs are also able to use this trail. Reviews Photos Tracks Matt Procyk (232) about 2 years ago N/A: 3 Completed 4 Reviews Probably one of the best trails in central Iowa. Its at a recreation center and costs 3 dollars to use the trail. The campgrounds is only 5 dollars a night for a sight and you get access to the trail with that. I've been up there a few times recently because its the only hike with any real distance that I know about that isn't more than an hour from Des Moines. Also this time of year no one is camping so we had the entire campgrounds to ourselves which made it that much more of an escape and relaxing.