Guide Rock, whose Pawnee name is Pa-hur or Pahur, is a hill in south central Nebraska in the United States.

The United States Geological Survey classifies it as a "pillar",[1] which it defines as a "[v]ertical, standing, often spire-shaped, natural rock formation".

[5] The difference might be due to human action: in 1973, it was reported that of the five sacred places of the Pawnee, four, including this one, had been "extensively damaged or totally destroyed".

Pahur was no exception: a large village of the Kitkehahki, or Republican Pawnee, was situated a short distance upstream from the hill.

The fourth of these, in 1806, consisted of over 600 men under Lieutenant Facundo Melgares; its size was intended to impress the Native Americans of the area and to secure their cooperation with Spain against the United States.

General James Wilkinson, the newly appointed governor of the Louisiana Territory, dispatched Zebulon Pike and 23 men to explore the headwaters of the Arkansas and Red Rivers, to negotiate peace between the Native American tribes of the area, and to contact the Comanche of the High Plains.

[11] They gave presents and a Spanish flag to the inhabitants, and requested that they block travel west and southwest into Spanish-claimed territory by anyone from the United States.

The failure of their expedition has been attributed to Pawnee opposition, combined with the difficulty of maintaining a force of that size on the country with no supply lines.