Poor phone photos, but a very cool tarantula hawk mimic (tarantula hawks are renowned for their painful sting). This is one of the most convincing mimics I've seen. Tarantula hawks have a nearly identical color scheme, and this beetle has even evolved similar behavior. It flies slowly, dangling long, black legs behind it, and waves its antennae around constantly when it lands.

One giveaway in flight is that its hind wings are grayish, instead of orange like the front wings. A tarantula hawk would have orange front and hind wings. I had a strong visceral reaction to NOT pick up this beetle, even when I knew its identity and that it couldn't sting me!

At about 4,000 ft. Tragidion sp., perhaps annulatum?