In 1909, a plan was approved for the construction of an advanced mine-artillery position in the narrow part of the Gulf of Finland, 60 km west of St. Petersburg. The position was to include two coastal forts: Alexeyevsky, located on a hill near the village of Krasnaya Gorka, and Nikolaevsky, built on the northern shore near the settlement of Ino. The design of the forts was led by the renowned fortifier K. I. Velichko, using advanced engineering solutions of that time.

Fort Ino stood out among similar fortifications due to the presence of large-caliber artillery, which for the first time used 305 mm caliber guns. At that time, the village of Ino was mainly populated by Finns, but also had summer cottages owned by prominent political figures and scholars of the Russian Empire. During the war, garrisons were stationed at these cottages. The complex consisted of three batteries: one with four 152 mm guns, another with eight 254 mm guns, and a third with eight 279 mm howitzers. All structures were protected by a two-meter concrete layer and surrounded by underground facilities with storages and barracks.

In 1912, two batteries with four 305 mm guns were built, one of which was of the turret type, and the other was open. The underground part of the fort was expanded and improved, a railway was laid for transporting shells, an electric lift was installed, and steam-water heating was set up. By 1916, both batteries were fully operational. The fort was constantly manned by two companies of fortress artillery and two companies of infantry, but in case of necessity, it could accommodate up to two battalions of artillerymen and a battalion of infantry.

In 1918, after the revolution, Fort Ino was captured by a small detachment of Red Guards from Sestroretsk. In April of the same year, Finnish troops besieged the fort, hoping to reclaim lost territories. A detachment of 200 men held the defense until help arrived from Kronstadt, after which, by order of the government commission, the fort was blown up to prevent it from falling into enemy hands.

According to the terms of the Treaty of Tartu on May 14, 1918, the turret batteries of the fort were destroyed, and its territory was handed over to the Finns. Although they were supposed to completely dismantle all batteries, it is known that the 305 mm and 52 mm guns were used in the Finnish coastal fortification system.

Until the mid-1980s, the territory of the fort remained a closed zone due to the proximity of military units and a secret testing ground. According to local residents, experiments were conducted here on the effects of radiation on animals. Later, the testing ground was dismantled. Until the late 1990s, the area housed a military unit of the Ministry of Defense of the Russian Federation.