Escaltor -> Svelte Tiger -> Droopy Muffin -> Underdog ->999->overlook->stegosaurus->strong angel->santas little helper->lonely rock->Rembrandts brush, sissyphus to halfpipe. The new stuff on Broken Handlebar is pretty sweet as well..drops, big tabletop
You will not have any problems as long as you avoid 999, Stegosaurus, Broken Handlebar and Halfpipe...even those you might be able to get down with some care.
Thanks, the wife has done a couple of blue trails (Bemis and vast i think...it was a womens ride so did not go with her) at KT (we live 5 mins from there) and did ok on them . However we went to Trapp and she tried the "easiest" blue single track they had and it was way over her head.
Due to the largely non-technical, buffed-out design of most of the trails at Pine Hill, it lends itself as a great place to get introduced to singletrack (so long as there is a reasonable level of fitness - the entire early part of the ride is climbing). As was mentioned, avoid Halfpipe, Stegosaurus, Broken Handlebar, and 999 as those are the more advanced or technical trails in the network.
I just recently took a first-time singletracker there, and they were not over their head on anything. The route I took him was:
Escalator -> Svelte Tiger -> Sisyphus -> Rembrandt's Brush -> Sore Elbow. At this point he was tired from the climb in, so we shot up to Rocky Pond via Pond Road, then returned via Pond Road to come down Svelte Tiger back to Escalator to the trail head.
2005 Cannondale Jekyll with Manitou Minute Super 140mm
If you are spending the day there, you will likely be able to ride every trail you want. Pistol75's recommendation (which is similar to the one on the map at the trailhead) took me about 1 1/4 hrs. I went back for more by riding Birches/Vista/Ledges/Salamander/PA4J/Lonely Rock/Annex/Sore Elbow/Woods Rd/Freefall in another 45 min. or so.