Mount Tabor is an extinct[1][2] volcanic vent[3] with a city park on the volcano, located in Portland, Oregon's neighborhood of the same name.

[6] Near the peak, where a basketball court and outdoor amphitheater are now situated, part of the cinder cone has been cut away, and the rock is visible to park visitors.

[12] The land making up the Mount Tabor volcanic butte was identified as a site for reservoirs in the 1880s due to its ideal elevation for a water distribution system.

The Bull Run watershed was among the first federal lands to be set aside in the Forest Reserve Act of 1891 and enacted by president Benjamin Harrison.

Reservoir 6 is the largest, with two 37 million gallon chambers; it also contains a fountain, which was unused for many years; however, it was reactivated in early 2007.

Eliot arranged for Olmsted to visit Seattle for park planning, too, in order to help make the long trip financially feasible.

Olmsted recommended that Mount Tabor be protected for future park use, even though it was well removed from the city at the time.

The entire park, including the Central Maintenance Yard, was listed in the National Register of Historic Places[19] in 2004.

The nomination was forwarded by a community effort spearheaded and funded by the Mount Tabor Neighborhood Association.

[21] Oregon governor Julius Meier was chairman of the event, and Chester Harvey Rowell gave a speech.

Concern has been raised about the possible relationship between City officials and the engineering firms receiving the no-bid reservoir decommissioning contracts;[23][24] and about the role these parties may have played in lobbying for pro-underground-tank modifications (the "LT2" rule) to the Safe Drinking Water Act.

[25] On June 15, 2011, a man was observed urinating in a nearly 8-million-gallon reservoir, prompting city officials to drain the water at a cost of around $36,000.

[28][29] Following pressure from other open-reservoir cities, in 2011 the EPA softened its stance on the LT2 rule and allowed the country's remaining open reservoirs to halt burial plans;[30] but despite public outcry[31][32] Mount Tabor's open reservoirs remain slated for decommissioning.