Jockeys ride horses on mud flats before their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Jockeys ride horses on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Jockeys ride horses on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

A jockey rides her horse on mud flats during the tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Competitors race on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Competitors race on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Competitors race on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Competitors race on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Jockeys ride horses on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Jockeys ride horses on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

Competitors race on mud flats during their tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)

A jockey competes past horses that lost their riders on mud flats during the tideland race (Wadden Race) in Duhnen, Lower Saxony, Germany, July 12, 2015. (Photo by Fabian Bimmer/Reuters)