On the late June day we hit Oatman, the mercury hit 115?, so not even the reptiles were stirring. Why would we take a detour to see a tourist trap on such a hot day? To see the Oatman burros, of course.
Route 66, "America's Highway" runs parallel to I-40 from time to time, but not all the way through. Dusty and I took it for several stretches from New Mexico to California.