Tieton Peak is a 7,768-foot-elevation (2,368-meter) mountain summit in Yakima County of Washington state.

Tieton Peak is set in the Goat Rocks Wilderness on land administered by the Wenatchee National Forest.

Precipitation runoff from the peak's north slope drains into North Fork Tieton River, whereas the south slope drains into Conrad Creek which is a tributary of the South Fork Tieton River.

"[5] The mountain's toponym has been officially adopted by the United States Board on Geographic Names.

[4] Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains.