The Colo River, a perennial stream[2][3] that is part of the Hawkesbury-Nepean catchment, is located in the Central Tablelands of New South Wales, Australia.

Colo River flows eastwards and then south through a deep gorge in the northern section of the Blue Mountains.

Local volunteer bush regeneration groups such as the "Friends of the Colo" have been helping eradicate invasive exotic weeds in the area surrounding the river.

[citation needed] The traditional custodians of the land surrounding the Colo River are the Australian Aboriginal peoples of the Darug nation.

[4] The area of the lower Colo River was first explored by Europeans in June 1789 by Governor Phillip and settlement commenced from the early 1800s via land grants, that were significantly expanded from 1833.