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VIDEO: 2019 GRINDURO! California: The Mayhem of Rain, Cold, Sun & Snow in One Day! - Gravel Cyclist: The Gravel Cycling Experience
“A New Kind of Bike Race – In 2015 the Grinduro event concept was brought to life in a joint venture between Giro Sport Design and Sierra Buttes Trail Stewardship. SBTS were able to realise the dream of Grinduro and the rest as they say is history.” – Grinduro.com “The event is produced by Sierra …