Complex sentence: In 2003 Valič spend two months in Yosemite valley with Matjaž Jeran, where they free climbed the El Capitan rock formation's Freerider route (1200 m, 5.12d/13a).
Split into simpler sentences: In 2003 Valič spend two months in Yosemite valley with Matjaž Jeran. They free climbed Freerider route (1200 m, 5.12d/13a).