Nordkollen is a short detour off the main highway.
Well worth it in my opinion. A charming spot. There’s an excellent free campsite on Sommarøy, as well.
The hike is only 1.6-km out-and-back. About an hour. BUT it’s steep and interesting due to the rope & chain assistance.
In good weather, you are not likely to use the ropes much. But in wind, rain, snow, or ice it would be useful.
Of course there are great vistas once at the top in good weather.
As always, footing is more challenging on the steep sections going down.