4. Tallinna Teisipäevak

4. Tallinna Teisipäevak is an official amateur weekly orienteering event in the Harku area of Tallinn, Estonia on 28 April 2026. The official Estonian Orienteering Federation event page confirms the 2026 date, venue area, and organizer, while the official OK Nõmme site describes the Tuesday series as a weekly public orienteering event held from April to September in Tallinn and Harjumaa.