Run or walk with us around the beautiful Snitser Mar on the longest Saturday of the year. Are you going for 42, 21 or 10 km? The 7th edition of Mar-athon Sneek will take place on Saturday, June 24, 2023. The Mar-athon Sneek takes you past picturesque Frisian villages and through the abundant summer greenery. Experience the different elements of the Frisian landscape and be surprised by the water-rich environment. Which challenge are you going for? Registration traditionally starts on the shortest day of the year, Wednesday, December 21, 2022.