The Quads, Balm Boyette...
Easy to map, 4 sections, 4 places to regroup, The rocks at red shirt are a cool distraction and 13 year olds will get a kick out of Sasquach.
At that age there's alot of energy to burn so the two mile double track in and out should zap em.
Unlike Flatwoods the quads have no secondary trails to get lost on. And far less roots,,,,
I'd keep em off the SST it being a bit narly underfoot and some narrow two way faster traffic found in there at each end..