| Guadu Grande | |
| Pushpin Map: | Corsica#France |
| Subdivision Type1: | Country |
| Subdivision Name1: | France |
| Subdivision Type2: | Region |
| Subdivision Name2: | Corsica |
| Subdivision Type3: | Department |
| Subdivision Name3: | Haute-Corse |
| Mouth: | Mediterranean Sea |
The Guadu Grande (co|'''U Guadu Grande''') is a small coastal stream in the department of Haute-Corse, Corsica, France.It enters the Mediterranean Sea from the west of the Cap Corse peninsula.
The Guadu Grande is long and flows through the communes of Brando, Ogliastro and Olcani.It rises to the north of the Monte Stello in the west of the commune of Brando.It flows in a generally northwest direction past the villages of Olcani and Ogliastro, then turns to the southwest and enters the sea at the north end of the beach of the Marine d'Albo.The last section of its course flows through a wetland,The Torra d'Albu stands at the south end of the beach.The D233 road follows the lower course of the river.
The lower part of the river valley and the Marine d'Albo have been designated a Zone naturelle d'intérêt écologique, faunistique et floristique (ZNIEFF) covering .It includes the dunes and beach, the estuary, the river and the river banks.There is extensive grazing in the wetland downstream.The sides of the valley at the Marine d'Albo have been modified to allow walking near a parking area for motor homes, and a camping area is planned just upstream of the ZNIEFF, but there does not seem to be a large number of visitors.
The following streams (ruisseaux) are tributaries of the Guadu Grande (ordered by length):