For the weekend warrior who has completed a marathon, jumped out of an airplane, and trekked through muddy obstacle courses, Solaris Vail has your next challenge. The 79-residence mountain resort, which opened in 2011, is calling all adventurers for its new Bag a Fourteener summer package (from $315 per person per night): a weeklong trip that culminates in the ascension of Colorado’s tallest mountain, Mt. Elbert. Available through September, the package includes overnight accommodations, training classes led b…