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A timed military rucking event over a fixed distance (typically 6-12 miles) with a fixed minimum weight (typically 35-45 lbs). Standards vary by branch and unit.
The most-cited Army standard: 12-mile ruck march in 3 hours with 35 lbs (excluding water + weapon), or roughly a 15-minute mile pace. Ranger School and Special Forces selection courses use heavier loads and stricter time standards.
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GORUCK
Both a gear company (founded 2008 by former Special Forces members) and the largest organized rucking-event series in the US. Their events range from the Light (5 hours, ~7 miles) through Tough (12 hours, ~15 miles) to Selection (48-72 hours, ~80 miles).
GORUCK Tough
GORUCK's flagship 12-hour overnight event. Standard load is 30 lbs (under 150 lb bodyweight) or 40 lbs (over). Combines rucking, team PT exercises, and load-bearing missions led by special-forces 'cadre' instructors.
GORUCK Selection
GORUCK's hardest event — 48-72 hours of continuous load-bearing movement, PT, and decision-making with no scheduled rest. Pass rate is typically under 10%. Often called the closest civilian approximation to military selection courses.
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