Rodale Inc. of Emmaus sold its Backpacker Magazine to Active Interest Media Inc. for an undisclosed amount, the companies said today.

Active Media, of El Segundo, Calif., publishes enthusiast magazines and books, holds consumer shows, and operates Internet sites.

Backpacker, founded in 1973, has a circulation of 340,000 for its nine issues per year. The magazine provides information about backcountry adventure in North America and focuses on hiking trails, camping gear and survival tips.

"The sale of Backpacker will allow Rodale to focus its resources on long-term growth and further strengthen the position of its business and brands in the health, fitness, and wellness space," said Steven Pleshette Murphy, Rodale's president and chief executive.

Jonathan Dorn, Backpacker's editor-in-chief, will join Active Media, which has 13 magazines in the fields of healthy living, marine, homebuyer and Western art/living.

Rodale publishes health, fitness and wellness publications with a combined circulation of about 40 million monthly. It also is a book publisher and operates Internet sites.