Throughout her sixth decade, accomplished solo backpacker Talie Morrison continued her wilderness adventures. Not for one minute did she think she was too old or that any trail was too dangerous.

In Still Going Strong, Morrison chronicles her travels during her sixties, which took her all over the world. She forged through raging snowstorms in Antarctica and spent almost two months walking across the entire continent of Europe. Morrison found herself in perilous situations, and all she had to rely on was her own extensive wilderness experience. She explains the strategies...