Medano Creek, a tributary of the Rio Grande, can fill the The Great Sand Dunes National Park valley floor with water during the spring and early summer months, creating a unique and temporary aquatic environment. . 👏📸larsleberphotography . . . #nationalparkgeek #greatsanddunesnationalpark #explorecolorado #coloradophotography #medanocreek #naturephotography #sangredecristomountains #desertvibes #instagood #coloradolife