The Iron Butt Association (IBA) is a US-based organization dedicated to safe long-distance motorcycle riding, which claims membership of over 75,000 people.

An example is the Saddle Sore 1000, where thorough documentation of the ride must be made, by collecting time-stamped gas and business receipts along the way, and by keeping a trip log recording mileage and location.

Additionally, the Iron Butt Association hosts the Saddle Sore 1000, the Bun Burner 1500, the Bun Burner Gold, the 50 cc Quest, the National Parks Tour Master Traveler Award, the coveted 10/10ths Challenge, the very exclusive 100K Club, and other longer themed rides taking place on different routes around the world.

To earn the points for a bonus, a rider must provide evidence by photographing an object or scene, purchasing a particular item, or by various other means specified by the organizers.

[7] To be considered a finisher of the event, a rider must be present at each of the checkpoints within a specific time window, and must earn a minimum number of bonus points during the rally.

Additional achievement levels (gold, silver, bronze) can be reached by earning more than the minimum required points.

[8] Joel Rappoport published Hopeless Class in 2012 about his Iron Butt Rally experience in 2009.

[9] Finally, Melissa Holbrook Pierson's The Man Who Would Stop at Nothing: Long Distance Motorcycling's Endless Road features the IBA in a broader discussion of the long-distance riding subculture.

[10] In 2007, a feature-length documentary, Hard Miles, was produced about that year's Iron Butt rally.

[citation needed] The 2009 rally was also filmed for a documentary DVD called Hard Miles 2 and included additional material and interviews away from checkpoints.

Pressure soon came from many riders who could not make the annual trek to California, so Les Martin, the driving force behind the CMTA, offered a ride that could be completed anywhere.

It was originally conceived by Dave McQueeney as a New York to San Francisco trip of 2,910 miles (4,680 km).

In the meantime a ride from Jacksonville, Florida to San Diego, California has become the most popular route, as it is only 2,345 miles (3,774 km) long.

The Iron Butt Association's 100K Club consists of riders who have ridden more than 100,000 miles (160,000 km) in one year.