You live in California. Half the state is mountain lion habitat. So, no, it聮s no big surprise that one has been reported near you. A few years ago my friend Phil insisted he saw a mountain lion face down in a road-kill deer carcass not ten yards off one of our most popular mountain-biking routes in Port Townsend. And that was near a busy street and a number of houses. I wish we had more mountain lions here. The deer have become insufferable.
Hiker

Mountain lions prefer deer. Lacking that, pets and livestock become target=s. A little bit further down the menu, humans. Mountain lion attacks are rare, but hardly unheard of. This past January, north of Eureka, a mountain lion attacked a 70-year-old man hiking with his wife. The wife clubbed the cat in the nose with a stick, surely saving her husband聮s life.
So, the first thing to do is avoid hiking in areas were cats are known to prowl. Easier said than done, I know. The next line of defense is to always hike with someone else (see above anecdote). I聮m not sure carrying any sort of a weapon would be helpful, but some kind of short club-like device might prove useful in a pinch. Be especially careful at dawn, dusk, and at night聴that聮s when mountain lions are most active. Pay attention to your surroundings. If you聮re at all concerned that you聮re in cat country, stop occasionally and look around. Mountain lions are stalking animals; they聮ll follow you until they find a time to pounce. Keep children and dogs close to you.
If you do see a cat, don聮t try to run. You look all the more tasty by doing so. Face the animal, yell at it, and try to make yourself bigger than you really are by waving your arms or flapping your jacket. If a rock is handy, throw it.
And, if attacked, fight back. Don聮t curl into a ball. Throw dirt in its face. Find a rock or stick and hit it. If you are with someone fighting off a lion, do the same.
Whew. Now I聮m all fight-or-flight-y. Keep in mind that such attacks are very, very uncommon. There聮s probably a much bigger risk of stepping on a rattler. But that聮s a topic for another day.
P.S. Gear Guy loves any questions that relate to poisonous reptiles.
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