One full time, 10 part-timers, this ad says.

REI OUTDOOR SCHOOL INSTRUCTOR

Instructors must have proven ability to manage and instruct large groups of people (typically 8 to 12 on an outing & up to 30 in an in-store class). They will also be required to be highly competent regarding course content, as well as skilled in demonstrating the designated activity or sport. Class topics and outings activities will include: Rock Climbing, Sea Kayaking, Mountain Biking, Road Cycling, Hiking, Natural History, Outdoor Photography and Navigation Outings for both Map & Compass and GPS.
Job Summary

The REI Outdoor School Instructor will be responsible for successfully leading REI Outdoor School programs. The instructor will instruct in-store educational classes as well as conduct in-the-field programs for REI customers. Outdoor School Instructors will be responsible for the delivery of class content, customer service during the outing, and the safety of all the participants. Instructors will also be responsible for maintaining equipment and coordinating outing logistics prior to field day. Instructors must have proven ability coaching large groups of people and leading instructional events. They will also be required to be highly competent regarding course content, as well as skilled in demonstrating the designated activity or sport.

No idea what it pays, mind you, but it could be fun, I suppose.