Superb backcountry app for Iphone

Ive tried several apps for hiking GPS, and this is the best Ive found.
Whats great:
- Downloaded maps are high resolution and very small, about 2.5 Mb.
- Track recording is very easy and intuitive. (This important feature is hard to find on other apps.)
- You can email your track or location to yourself or anyone else (if you have cell coverage). This is a nice safety feature as well as good data backup.

Keep in mind:
- This app is battery hungry, bring a spare.
- GPS signal may be lost in tree cover or in canyons, as Apple does not at present use a quality GPS chip like those in a dedicated GPS unit.
- Your phone without a good cover is not very sturdy.

ALWAYS have a map and compass to augment your GPS adnknow how to use them!

climberjohn about iHikeGPS : Classic Topo Maps, v3.5