Below are a list of general resources that we have found incredibly useful in planning our own far-flung trips. For resources more specific to an area, see the “Resources” section at the bottom of specific posts. Enjoy!
Websites
Climbing
The Alpinist: Online Climbing Magazine that includes an archive of trip reports
Summit Post: A crowd-sourced website with a wealth of information about climbing rock, snow and ice around the world (Best info about mountaineering routes)
Mountain Project: A crowd-sourced website with a wealth of information about climbing rock, snow and ice around the world (Best info about US Rock routes)
Planet Mountain: A crowd-sourced website with a wealth of information about climbing rock, snow and ice around the world (Best info about Europe)
American Alpine Club: Club website with an archive of trip reports
The British Mountaineering Council: Club website with an archive of trip reports
Boating
Asheville Area Boating Beta: Amazing website for whitewater that includes real-time flow for rivers in the Southeast, USA
American Whitewater: Great website for info on US rivers
Cycling
Bikepacking.net: Website dedicated to mountain bike packing, featuring DIY frame-bags and other bikepacking setups, as well as major routes (generally in the US)
Mountain Bike Project: Crowd-sourced online guidebook
Nutrition
No Meat Athlete: Great site with loads of vegetarian and vegan recipes geared towards athletes
Apps
Maps.me: Offline maps that include most major (ride-able) trails
MadBarz: Offline training app
Nike Training Club: Offline training app
Map My Fitness: Fitness tracker, GPS driven mapping of routes, route recording
Trip Case: Organizes flight information
Other
Outdoor Gear Lab: Outdoor Gear Reviews