What is the oldest tree in Assen?
The oldest tree around Assen is the Thick Oak of Beilen, an oak at a road junction outside Beilen. The national tree register bands it to 1750-1800, roughly 225 to 275 years old, while local accounts say 350, so it is somewhere between 250 and 350 years old.
Ages here come from the Landelijk Register Monumentale Bomen, which records a planting decade rather than a year, so every figure on this page is a band rather than a measurement. The register is the single source for eight of the nine, so those entries ship flagged rather than confirmed. The oak at Beilen carries a second source and a disputed age: 350 years locally, 1750 to 1800 by the register's own arithmetic. Two of the nine, the horse chestnut and the broken cypress, stand together on Overcingel, a private estate landscaped in 1824 and free to walk with a card from Het Drentse Landschap's Assen office, or without one during the February and March crocus season. Two more, a weeping beech and a copper beech, share a pocket garden behind a house called Nieuw Echten, reached through a footpath between two front doors on Alteveerstraat. The rest stand on public ground: a deer park, a former manor's grounds now open as Valkenstijn, and a former hospital site along Beilerstraat. Where a pin is marked approximate, we know the site and not the exact trunk.
One of Assen's trees also appears in Autumn Worth the Trip.