I was wondering what tools/software/websites that everyone uses for planning their backpacking trips? And what are your favorite features or tools of that software or website that you have found to be most useful? I am planning a trip with Ian B for the Sawtooth Wilderness in July and once he gave me the .gpx file of the loop we are doing I have downloaded it to Gaia on my iPhone, downloaded a bunch of useful maps I can use offline with Gaia. I converted the gpx file to a KML file for use in Google Earth and I have found a ton of useful features in there. Being able to view topo maps, waypoints, create a path of the loop to plot elevation and distance of the hike and all the side trips we have planned for peaks, being able to scroll the sun through the day so that we know when the sun sets behind a peak/ridge at the alpine lakes we are camping at so we know how much daylight we will have, being able to fly the loops path to see what the terrain and elevation look like and much more. I have as always found the people of BPL to be a great resource too!
So what other free or affordable tools/software/websites are out there that you have found useful?

