<Tr> <Td_colspan="2"> Tributaries </Td> </Tr> <Tr> <Td> - left </Td> <Td> Red River, Rio Hondo, Rio Pueblo de Taos, Embudo River, Santa Fe River, Galisteo Creek, Alamito Creek, Terlingua Creek, Pecos River, Devils River </Td> </Tr> <Tr> <Td> - right </Td> <Td> Conejos River, Rio Chama, Jemez River, Rio Puerco, Rio Conchos, Rio Salado, Rio Alamo, San Juan River </Td> </Tr> <Tr> <Th> Source </Th> <Td> Canby Mountain, Continental Divide </Td> </Tr>

About how many miles is it from north to south across texas at its widest point