KEECHI CREEK (Falls County). Keechi Creek rises three miles northeast of Perry in northern Falls County (at 31°26' N, 96°53' W) and runs southeast for fourteen miles to its mouth on Big Creek, five miles east of Marlin (at 31°18' N, 96°50' W). It traverses low-rolling to flat prairie surfaced by clay and sandy loams that support mesquite, scrub brush, cacti, and grasses.