The partnership includes the presenting sponsorship of 60-plus events next year.
The outdoor footwear and apparel brand will also be the presenting partner for the new shorter distance format Tough Mudder Half event series.
Jim Gabel, president of Merrell, says: “Tough Mudder shares our vision of wit and grit and together we are committed to inspiring others to overcome obstacles by eliminating barriers to enjoying the outdoors.”
Each event features a 10-plus mile course with obstacles designed to test participants’ physical and mental strength.
Two million people have taken part in a Tough Mudder since the series was launched in 2010.
As well as being present at every event, Merrell will also be supply finisher t-shirts and producing a range co-developed with Tough Mudder, including a trail running shoe called the All Out Crush.
