Klínovec, Mountain summit in the Ore Mountains, northern Bohemia, Czech Republic

Klínovec is a broad, rounded ridge in the Ore Mountains reaching 1,243.7 m, the range's highest summit. Its upper slopes are covered with coniferous forest cut by straight clearings, with meadows and scattered buildings below. On the summit plateau stand a slender 24-metre stone observation tower and an 80-metre concrete telecommunications tower.

Jáchymov erected a viewing tower on the summit in 1817, and Karlsbad spa guests reached it by horse-drawn carriage until it burned down in 1868. The Ore Mountains association began a stone tower in 1883, opened in August 1884 as the Kaiser-Franz-Josephs-Turm, and added a lodging wing on 18 August 1893.

The mountain's German name Keilberg replaced the older Sonnenwirbel in the second half of the 19th century; after 1918 the Czech name Klín was adopted from it, and Klínovec became standard in the late 1920s. The summit hotel's hall has a coffered ceiling showing the coats of arms of Ore Mountain towns.

A road from Boží Dar reaches the summit, and marked trails climb from Jáchymov and Loučná pod Klínovcem. The four-seat Jáchymov–Klínovec chairlift runs year-round, covering 2,168 m with a 480 m height gain; in summer it carries cyclists and their bikes to the ridge trails.

The summit hotel and the 24-metre lookout tower beside it are the oldest and highest-placed buildings in the Ore Mountains. The tower is a replica: the original octagonal stone structure leaned about 60 cm at the top, and the rebuilt version reuses its stone staircase and cornices.