An Anaheim pepper is a mild variety of chili pepper. The name "Anaheim" derives from a farmer named Emilio Ortega who brought the seeds to the Anaheim, California, area in the early 1900s. They are also called California chili or Magdalena, and dried as chile seco del norte. Since Anaheim peppers originated from New Mexico, they are also sometimes known as New Mexico peppers. Additionally, in New Mexico they are often referred to simply as "chiles" because they are so ubiquitous.
The chile "heat" of Anaheims typically ranges from 500 to 2,500 on the Scoville scale however, many varieties grown in New Mexico can reach 4,500 to 5,000 Scoville units.