Google just recently launched their "Terrain" overlay. Microsoft has had one for
a while over at maps.live.com, but I like Googles version better. It's cleaner and more detailed.
I wonder if someone will create a website where hikers can start plotting out trails using a combination of the Google My Maps and Terrain features.
Here's a quick sample one I whipped up for Copper Ridge Loop: Copper Ridge Loop Map.
Something like this for all the hikes in the US, with clickable pushpins showing photos at that view point. How cool would that be?
Heck – I'd even go a step further and allow people to collaborate photos taken from the same view point, combined with Photosynth to give a 360 degree view.