Heldrastein, Mountain summit in Wartburgkreis, Germany.

Heldrastein is a summit in Wartburgkreis with limestone cliffs rising above the Thuringian landscape near Treffurt. The peak features a viewing platform and is accessible via marked hiking routes of varying difficulty levels.

Military installations were built on the mountain during the Cold War, making it off-limits to the public for decades. After reunification, the site was cleared of military use and opened to visitors beginning in 1996 as a public viewpoint.

The name comes from the pale Muschelkalk rock: old maps call it "Der Hellerstein", and the local dialect still uses that form. The nearby Henningshöhle, a crevice cave below the cliff edge that collapsed after the 1960s, was said to hide the bandit leader Henning, caught by a trick.

The summit lies in the DDR border zone and was closed to the public from 1952; the 1890 viewing tower and the forest inn were demolished. The 30 m Turm der Einheit now gives a full panorama, reaching the Brocken 82 km away on very clear days. The cliff edge itself is a natural viewpoint over the Werratal from Treffurt to Wanfried.

The 30-metre Tower of Unity on the summit allows a full 360-degree view; from the cliff edge the panorama runs from the Hoher Meißner and Gobert in the northwest past the Hülfensberg and Plesse to the Adolfsburg and Normannstein, and on very clear days the Brocken is visible 82 km away.