Battle of Otepää was a battle during the Livonian Crusade in 1217. The battle ended with a victory for the Estonians and Russians. In February 1217 a large Russian force along with Oeselians and other Estonians arrived at Otepää to besiege it. The number of the besiegers is said to have reached 20 000 men. Because the stronghold was located on a very well defended hill, the siege lasted for 17 days.