Lightweight Backpacking Links

Backpacking
Backpacking Light
John Muir Trail
National Parks Traveler
Pacific Crest Trail
Practical Backpacking
Sierra Wild
Trail Cooking
Trail Journals

Outdoor Ethics
Leave No Trace
Sierra Club
Restore Hetch Hetchy

Bushcraft & Survival
Ray Mears Bushcraft
Nature Skills
Dr. Eric A. Weiss's Wilderness and Travel Medicine (PDF)

Central California Backpacking
Fresno Backpacking Examiner
Fresno–Madera Hiking Group Meetup
Sierra Club's Tehipite chapter