Horseback riding can be a fun outdoor activity for seniors. If you’re fit, why not? The Bay Area boasts some great stables where geezers are welcome. There are spectacular trails near the coast accessible from Sea Horse Ranch in Half Moon Bay or Miwok Stables in the Marin Headlands. In Livermore Roberta Reinstein of Reinstein Ranch recommends newbies take individual lessons starting in a corral long before hitting trails. It’s all about safety. When a geezer bites the dust, bones don’t heal as fast as used to. $200 for five one-hour lessons is typical.