Michael Pelkey and Brian Schubert make the first BASE jumping from El Capitan, a prominent rock formation in Yosemite National Park in 1966. Both would suffer injuries though because of it. :
NOTCH PEAK BASE JUMP: THINGS JUST GOT HYPERREAL
A Beginner's Guide to BASE Jumping
Daredevils Attempt Britain's First-Ever Tandem Base Jump - Zenger News
First Jump Course | 50calBASE
First-Person Video of a BASE Jumper Leaping Off a Cliff Into a Mysterious Foggy Void
In Conversation with India's first woman BASE Jumper Archana Sardana
I built a rig from scratch and jumped it on my first base jump : r/SkyDiving
Lonnie Bissonnette: Never Give Up - This Adventure Life
Goz's first BASE jump Kjerag - YouTube
Learning to BASE Jump | Steph Davis - High Places
First BASE Jump Course - Bob's BASE Academy
Your First BASE Jump Archives - Skydivemag
How BASE Jumping Works | HowStuffWorks
EpicTV Video: First Ever BASE Jump & Wingsuit Off Washington Cliff | Mountain Flying USA with Sean Leary, Ep. 2 | EpicTV