I've ridden a few over the years, mostly without realizing it. There are a couple one could ride through while wondering where the actual pass is. Not so Smuggler's Pass north of El Paso:
https://pjammcycling.com/climb/1248.Smugglers-Pass-West
There's some good ol' Texas history in the passes. Mountain Pass just west of Abilene saw twice-weekly Butterfield stagecoaches. The 49ers rushed through Reichenau Gap on their way to the California goldfields. The US Cavalry's quirky experiment in the 1850s saw trains of camels led through Bandera Pass. Infamous Texan Jim Bowie fought a desperate battle with Native Americans in Silver Mine Pass. Buffalo Gap was a major bison migratory route, and buffalo hunters set up a big camp there to slaughter the animals (scientific name: Bison bison) as they funneled through. For several years Big Foot Wallace drove the mail wagon through Wild Rose Pass on a run that stretched from San Antonio to El Paso. A prohibition-era federal agent raid on a distilling operation in Spanish Pass was said to have closed down half the speakeasies in San Antonio.