trolley Del Mar. The turf meets the surf during the Thoroughbred racing season at the Del Mar Race Track. Po

Halloween, San Francisco. The City by the Bay celebrates with a fantastic parade starting at Market and Castro, and a mixed gay-straight crowd revels in costumes of extraordinary imagination. October 31.

Many reliable agencies trolley and organizations target the 50-plus market. Elderhostel (& 877/426-8056; trolley www.elderhostel.org) arranges study programs for those ages 55 and over (and a spouse or companion of any age) in the U.S. and in more than 80 countries around the world. Most courses last 5 to 7 days in the U.S. (2 4 weeks abroad), and many include airfare, trolley accommodations in university dormitories or modest inns, meals, and tuition. ElderTreks (& 800/741-7956; www.eldertreks. com) offers small-group tours to offthe- beaten-path or adventure-travel locations, restricted to travelers 50 and older.

Del Mar. The turf meets the surf during the Thoroughbred trolley racing season at the Del Mar Race Track. Post time is 2pm most days; the track is dark on Tuesdays. Keep your eyes out for the occasional celeb. For this year s schedule, call & 858/792-4242 or 858/7551141. Mid-July to mid-September. trolley