I entered the Kofa National Wildlife Refuge using King Road, which can be reached by pavement from U.S. 95. This road is wide, graded, and actively maintained so any vehicle should be able to pass through. Once you reach Castle Dome Mine Road it gets a littler rockier and rougher though any 2WD truck with good ground clearance can make it. Find more info on the area here: https://www.fws.gov/refuge/kofa/

Google Maps

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There are numerous junctions in the Refuge and I turned south at Junction 60. Don’t forget to pick up one of the free maps.

You have to be careful where you park in 2WD vehicles with street tires.

There’s even a museum out here!