It is a tributary of the Tuy River and is 72 kilometers (45 miles) long in length.

It rises in an area called Las Adjuntas in the Capital District of Venezuela at the confluence of the San Pedro and Macarao Rivers.

[3] As the march progressed through Caracas, the National Guard began to block routes and fire tear gas at marchers at 11:50am, whilst the demonstrators refused to leave despite the use of force.

[3] At about 12:30pm, demonstrations by both opposition and pro-government Venezuelans filled Caracas' avenues.

[3] Shortly after 12:45pm, protesters on the Francisco Fajardo Freeway near Bello Monte began to flee the area, with many leaping into the Guaire River, which is used for sewage drainage, to avoid the tear gas.