Complex sentence: In Colorado Springs, the Fountain turns south after picking up Monument Creek west of downtown, flowing through the eponymous Fountain, Colorado and crossing into Pueblo County before finally reaching Pueblo where it joins the Arkansas River.
Split into simpler sentences: In Colorado Springs the creek turns south, after picking up Monument Creek west of downtown Colorado Springs, and flows through the eponymous Fountain, Colorado. It then crosses into Pueblo County before finally reaching Pueblo where it joins the Arkansas River.