Where is hiking app for iPhone 6?

I thought I saw a hiking/biking app either in the keynote or on Apple's site for the iPhone 6 but I can't find it now. It showed a highlighted route from a hike or bike trip. It used the iPhone 6's altitude feature (or barometer???). Any one one know what this is called or what app is required to trace out your hike or bike route?

This is for the iPhone 6 and not iPhone 6 Plus (just in case that feature is specific to the Plus).