渓間[keikan] ravine
渓谷[keikoku] valley
渓流[keiryuu] mountain stream
渓流釣り[keiryuuzuri] mountain stream fishing
厳美渓[genbikei] Genbi Gorge (Ichinoseki-shi, Iwate-ken)

雪渓[sekkei] snowy valley
猊美渓[geibikei] Geibi Gorge (Higashiyama-cho, Iwate-ken)
渓声[keisei] sound of a valley stream
渓壑[keigaku] ravine