California barrel cactus

A large barrel cactus that can reach 6.6 ft in height. Aka Miner's compass. I found about 6 specimens while at the park. This one was about 20 inches in Height. They have long red spines that turn grey with age. They also have a tendency to lean towards the southwest. They are actually orienting themselves towards the noonday sun to protect themselves from the heat, hence the Miner's Compass name.