Timber Top Mountain is an 8,055-foot (2,455 m) mountain summit located in the Kolob Canyons section of Zion National Park, in Washington County, Utah, United States.

[3] Its nearest higher neighbor is Horse Ranch Mountain, 3.9 mi (6.3 km) to the north-northeast, Nagunt Mesa is immediately north, and Tucupit Point is situated 2.8 mi (4.5 km) to the north.

Walls of Navajo sandstone encircle this mesa-like feature, ranging from 400-ft high on along the south side, up to 2,000 feet on the north aspect.

Kolob Arch is set on the lower southeast cliff of the mountain, and Shuntavi Butte forms the west tip of the mountain.

Precipitation runoff from the mountain drains into Timber Creek, which is within the Virgin River drainage basin.