If you're new to trail running, check out this trail running 101. Here's a list of seven "must knows" before you head for the trails.
Trail Running 101 BLISTER Outdoor Media & Gear Reviews
Training – Trail Running 101 - : Asian Triathlon Online Magazine
16 of the Best Trail Runners in the World
Trail Running 101, the Trail Runner's Checklist
Free Trail Race Training Plans For Every Distance - Long Run Travel
Kim Levinsky and Sassquad Trail Running – iRunFar
Trail Running 101: How to Trail Run Safely
How to Start Trail Running: Essential Gear, Tips and More
What is Trail Running? - Ultra Running Magazine
Trail Running 101 BLISTER Outdoor Media & Gear Reviews
Essential Gear for New Ultrarunners - Ultra Running Magazine
Ultra Weekend Recap — October 29 - Ultra Running Magazine
Trail Running - Trail Racing for Beginners