Rick,
Excellent article.  Valuable update from what Herrero wrote. As the old saying goes, "Forewarned is forearmed" -- but only if people willing to learn.  Wonder whether there is any kind of supersonic alarm that could be carried on a bike, powered by the bike's movement, that would pulse and warn a bear someone is approaching.  (Pulsed sounds are more attention-getting and easier to locate directionally).  SFS Bear Biologist