When my two girlfriends and I spent an October weekend in Keystone, Colorado, thanks to new friends at SummitCove vacation rentals, we knew an integral part of our girls’ getaway would be a spa day (or at least a half day) at the RockResorts’ Keystone Lodge & Spa. Spa relaxation lounge. This AAA four-diamond property totally renovated its spa in 2007 to expand the facilities and make it more environmentally friendly. In fact, the spa now features 100 percent wind power, organic products,