OnTheSnow.com is a one stop source for all of your skiing and snowboarding information. They have snow and weather reports for most resorts around the world, ski gear buying guides and reviews, and information on ski trip planning and vacation packages and deals.
Trailspace is a backcountry gear guide dedicated to helping outdoor enthusiasts of all abilities -from trail novices to confirmed gearheads - select dependable outdoor gear that lets them get out and enjoy human-powered backcountry activities. Trailspace publishes independent reviews, news, and discussions about thousands of outdoor products, helping hikers, backpackers, climbers, skiers, trail runners, paddlers, and other outdoor enthusiasts find dependable and appropriate gear for their adventures.
Avalanche.org is an online resource center for everything avalanche related. Go here to get all of the information you need to stay safe in the backcountry. They offer links to local avalanche agencies across the country along with online avalanche safety tutorials. They can also help you find avalanche safety training courses in your area.
A new website dedicated to mountain weather in more than 9300 (and growing) major summits for climbers and mountaineers, provided for up to 5 different elevations.