No lift lines, lots of terrain for all levels
Keystone has the most terrain of any summit county resort. It often gets a rap for being too 'family' oriented, but here's what I think. The resort/accomodations/nightlift ARE family oriented, and one run (3.5 mi Schoolmarm) on the mountain is too plus all the groomers on the front... however if you start moving back to the back of the 1st mountain, front and back of the 2nd, left and right of the THIRD AND 5 bowls... there is enough tree/glade/steeps for anyone.
not sure how it got labeled a family mountain, but i'm glad it is since i'm often all alone back on the 3rd mountain getting freshies 3 days after a dump.
we stayed with skyrun vacation rentals run by real skiers and they were great. i like the mountain house base area where i stayed but see the attraction of river run to the urbanites too... it's all good. try the inxpot coffeehouse too... nice $3 irish coffees.