Ha:san Bak, or Saguaro Harvest, is a rite of summer unique to the Sonoran Desert.

The bright red fruit of the stately cactus has sustained generations of desert dwellers.

The harvest occupies a revered part of the Tohono O'odham calendar, taking place once the fruit has ripened and before the monsoon.

Colossal Cave Mountain Park, 16721 E. Old Spanish Trail, has been hosting a harvest celebration for 11 years. It's become one of the park's biggest events. This summer it will take place on July 7.

There's room for 25 people in a workshop that starts at sunrise and includes the opportunity to harvest fruit. The cost is $65 (or $100 for two people), and as of this week 10 spaces remained.

From 10 a.m. to 3 p.m. the celebration widens to an event that can draw several hundred eager to buy traditional foods like frybread, learn about the cactus, taste the fruit, meet some wildlife and learn what it was like to survive in the desert. The cost is $5 per vehicle.