The forest around the Rio Grande is called the Bosque (Spanish for 'forest') Historic Bosque vegetation included Rio Grande Cottonwood, Gooding's Willow and Peachleaf Willow (both tree willows close to the size of a cottonwood when mature), New Mexico Olive (sometimes called NM Privit) which is a tallThe Rio Grande Valley (informally called The Valley) is a region in Deep South Texas, which includes Cameron, Hidalgo, Starr, and Willacy countiesTo the east this region is bordered by the Gulf Coast of TexasTo the south it is bordered by the Rio Grande River and the state of Tamaulipas, MexicoTo the north and west it is bordered by the Texas counties of Kenedy,A trailhead and parking for the Rio Grande Valley State Park Calabacillas is located on the westside of the river off of Coors, north of Paseo del Norte From Coors, turn right (east) on to Westside drive (3/4 of a mile north of Paseo del Norte; Palm Trees Of The Rio Grande Valley Hubpages Rio grande valley valluco palm