Extreme North Dakota Watersports Endurance Test

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Extreme North Dakota Watersports Endurance Test (END-WET) in the mighty Red River of the North
Extreme North Dakota Watersports Endurance Test, or END-WET as it is known, is a 27-mile (43.4 km) mixed-sports event where solo and relay swimmers pit themselves against other endurance athletes down the Red River between Grand Forks, North Dakota and Oslo, Minnesota in the United States. It is one of the longest marathon swims in the world and directed by Andy Magness.


2012 Edition

The initial race was organized by ENDracing on 21 July 2012 where kayakers, surfskiers, stand-up paddle boarders as well as marathon swimmers compete in an extreme race in the upper Midwest. Darren Miller won in 9 hours 11 minutes while Dan Projansky finished the race swimming the entire way butterfly in 14 hours 30 minutes.

2013 Edition

Karen Zemlin finished just ahead of Jen Schumacher in 6 hours 58 minutes.


Escort Boats

Solo swimmers are required to provide their own support boat where non-motorized watercraft are preferred. Relay swims teams also need to provide their own support boat/team dugout.

Relay Rules

Relay swimmers can swim in any order, but new swimmers must enter the water up-river of the retiring swimmer and before the retiring swimmer makes contact with the support boat. Swimmers are allowed to change out within 100 yards of any mile marker, so must swim, at minimum, one mile per rotation. River miles will be clearly marked on river right.


All profits help support Ground UP adventures, a local North Dakota non-profit dedicated to bringing adventure to the region's youth and larger communities.

2012 Solo Participants

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