In May 2012, King Harald marked the 250th anniversary of Hadeland Glassverk.
Heimskringla, Fagrskinna, Ágrip and Historia Norwegiæ all relate that Halfdan drowned when he fell through the ice at the inlet Røykenvik in the lake Randsfjorden on his return home from Hadeland.
The area was an important crossroads also in old times, where the road from the bottom of Oslofjord ramified into the road east to Romerike and north to Maridalen/Hadeland.
Trond-Arne Bredesen (born February 4, 1967 in Gran, Oppland) is a Norwegian nordic combined from 1986 to 1991, representing Gran I.L. in Hadeland.