Short answers, pulled from the story.
Mountain biking began in the late 1960s when a group of cyclists in Marin County California modified heavy cruiser bicycles into off-road machines. These early riders known as the Repack Racers used old Schwinn Excelsior frames to tackle rugged fire roads on Mount Tamalpais.
Joe Breeze constructed the first frame specifically designed for off-road use by 1978. Tom Ritchey joined forces with Gary Fisher and Charlie Kelly to form MountainBikes which later evolved into Fisher Mountain Bikes and became part of the Trek brand.
Cross-country riding is the only mountain biking discipline featured in the Summer Olympic Games. This discipline focuses on endurance and physical strength with bikes weighing between 9 and 13 kilograms.
The International Mountain Bicycling Association works to address soil and vegetation damage caused by skidding and unauthorized trail construction. The organization promotes responsible riding practices such as cleaning bikes between rides and staying on designated trails to prevent the spread of invasive species.
Mountain bike sales surged during the 2020 pandemic as vendors reported sold-out bikes under 1,000 dollars. People sought outdoor activities during lockdowns which drove demand for affordable mountain bikes and access to bike parks and resorts.