Quickest would be I-10 to El Paso then US 180 to the Caverns.
Taking US-70 then US-82 is more scenic and would allow you to see White Sands National Monument along the way.
Thanks for the feedback! The 180 looks busy out of El Paso with all those traffic lights and downright desolate for close to 200 miles. Any gas once out of the city?
As you are going south on I-10, watch for the exit for the Transmountain Highway. Take that and you bypass all of El Paso, and come out on US 180 east of town. There are some gas stations close to the intersection of the bypass and 180. The highway is designated Texas 385. Hope this helps.
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