I have a standing weekly date with one of my grandma friends to walk the steep trails--not for sissies. My friends app says it is a 50-story hike. If we feel tired, we walk slower.

There are amazing views of the Bay that can feel like rewards as you walk up up up. Friends comment on my vitality--this hike is part of my exercise program. I think it is part of the reason that I scored in the 99 percentile during my last stress test.

The beginning of the climb has the advantage of amazing work of volunteers removing non-invasive plants and replacing them with local flowering varieties.

This, for me, is 100 times better than a stair master at a stinky gym. And the price is right! Free.