Nørrebrogade is Nørrebro's spine — three kilometres of road that runs from Dronning Louises Bro (Queen Louise's Bridge) at the lakes all the way up to Nørrebro S-tog. The walk takes the long way: bridge in, lakeshore out, then back onto the spine.
Three and a half kilometres, ninety minutes if you stop for coffee. Start at Nørreport and walk north to Dronning Louises Bro — historically the most-cycled bridge in the world, still busy enough that pedestrians get the inside lane. Cross to Nørrebro proper.
Then the lake walk: Sortedams Dossering runs along the Nørrebro side of Sortedam Sø, the easternmost of the three inner lakes. Forty minutes of flat path along the water — willow trees, joggers, a heron if you're lucky. Cut back onto Nørrebrogade via Folkets Park — a small neighbourhood park in central Nørrebro, working as a meeting point.
End at Stefansgade's café cluster (two streets west of the spine) and the walk down to Nørrebro S-tog. Five minutes south on Nørrebrogade for one more block of the spine if you want to end on it.