Jim Mayfield became interested in the sport of boomerangs in the mid 1980s. He travelled to boomerang tournaments to compete and to collect boomerangs from other top competitors. Jim learned how to make his own boomerangs rather quickly. He began producing commercial boomerangs at his Gunnison Colorado home in the late 1980s. A few years after forming Colorado Boomerangs, Jim sold his company to Richard Pollock-Nelson. Jim worked with Richard after the sale to make sure that the quality of Colorado Boomerang products remained high after his departure. Jim Mayfield was critically injured in a motorcycle accident on 11 October 1999. He died two weeks later at the age of 48. Early examples of Jim's products are very collectable. Colorado Boomerang products made under the direction of Richard Pollock-Nelson are high quality replicas of the original Mayfield boomerangs. 

The Kilimanjaro is one of the more popular boomerangs made by Colorado Boomerangs. It has two lead weights embedded into each tip. The design is similar to the famous Al Gerhards standard hook. The range on this boomerang is expected to exceed 50 metres. Best if used by an advanced thrower with fine tuning skills and longer range throwing experience. Nicely painted. This boomerang is in mint condition.