Off Hwy-18, 4 miles West of Crestline. Los Angeles high-flyers buy weekend retreats on Lake Arrowhead where they can imbibe crisp alpine air and gaze contentedly across a wide expanse of privately-owned water fringed by fir and pine trees. It’s a lovely setting but unless you’re very well connected the most you can expect from it is an enjoyable narrated cruise on the Arrowhead Queen, a paddle-wheel vessel departing several times daily from Leroy’s Sports, in Lake Arrowhead Village (for details: tel. +1 909 336 6992; ( http://lakearrowheadqueen.com).