Aegviidu is a borough in Anija Parish, Harju County, Estonia, most known for its picturesque surroundings and hiking trails.

[6] In 1796, Count Ludwig August Mellin referred to the settlement as Aegwiid on his topographic map of the Tallinn Kreis, as part of The Livonian Atlas [Wikidata].

Some sources claim that the name Aegviidu first appeared in the 18th century, when the Piibe road was being built through the local bogs, or in the 19th century, when the Tallinn-Narva railway was being built, which took lots of time (Aeg (English: time) + viidu (English: spend)).

[6] It is speculated that during the antiquity a winter road passed through the area of Aegviidu that connected Kehra and Jäneda.

[12] The ancient Jäneda hillfort [et] is located just a few kilometers southeast of current Aegviidu, on the coast of Kalijärv.

[6] In 1796, Count Ludwig August Mellin referred to Aegviidu as Aegwiid on his topographic map of the Tallinn Kreis, as part of The Livonian Atlas [Wikidata].

In 1917, the Lord of Lehtse gifted the Aegviidu hunting lodge to a local educational society and a school started operating there.

Since the hunting lodge was not fit to be a schoolhouse, the educational society acquired the coaching inn from the Lord in 1919, and the school has operated there ever since.

The railway, along with the construction of a water tower and a locomotive depot,[21] greatly accelerated the growth of Aegviidu, which was previously sparsely populated.

[22][23] Just before the Estonian War of Independence, Konstantin Päts assigned Eduard Piibemann to organize the Aegviidu self-defense force.

On the night of February 24, 1918, the force detained a Russian detachment near the railroad in Aegviidu and confiscated their weapons.

The area offers a range of hiking trails and well-developed infrastructure, including well-built roads, easy access, and gear rental points.

The two rivers are separated by just one kilometer at their narrowest point, which is occupied by the Nelijärve lakes, the Piibe road, and the Tallinn-Narva railway.

[31] Aegviidu is located in the northern part of the Kõrvemaa region, which is a sparsely populated area predominantly covered by wetlands and forests.

The Põhja-Kõrvemaa Nature Reserve is located a few kilometers north of Aegviidu and is accessible by a light traffic road.

Additionally, the smaller Niinsoni and Maapaju nature conservation sites are located between Aegviidu and Kehra.

[41] On 21 October 2022, Aegviidu lost approximately 36 inhabitants due to some of the borough's areas being transferred to neighboring Pillapalu and Mustjõe villages.