Galopprennbahn Hamburg-Horn (Hamburg-Horn Racecourse), also known as Horner Rennbahn, is a major horse racing venue located in Horn, Hamburg, Germany. It is Germany's oldest horse-racing track, built in 1855. It has a capacity of 50,000 spectators. Since 1869 it hosts the annual Deutsches Derby on distances from to , among others.
The nearest public transit station is Horner Rennbahn station of Hamburg U-Bahn.