Mt Whitney Zone Forums General Discussion Cottonwood to Whitney advice for a high altitude newbie.

I paid $8 for Backcountry Navigator Pro. It takes a little effort to learn to use it, but it’s perfect for me. You can download CalTopo maps free. You can also download .GPX files (created on CalTopo or elsewhere). Then you turn off Bluetooth and select airplane mode (to save battery) and start hiking. I’m very careful to turn it off when I don’t need it, and I still had 67% battery left after four days.