This is a really interesting part of the Calico Mountains. Green-sticker vehicles are permitted and will enjoy the side roads available in the area. There is one that leads to Kramer Arch that is particularly fun. There are open mines in this area, so be vigilant.
Like Doran Scenic Drive, Phillips Loop was also paved back in the 1930s and was a popular tourist destination for about 10 years. Today, what little pavement remains only serves as an obstacle to make the drive more challenging.