The Reinfossen (also called Reinforsen) is a waterfall with a drop of 60 meters in the river Bjerkaelva. The waterfall is situated along road Fv326 close to a small village called Reinforsmoen in the municipality Hemnes/Nordland. From Mo i Rana it is a 45 minute drive (38 kilometers) by car to the south over road 6, in Bjerk take the turn to the Fv326 into the Bjerkadalen.
I am not sure how the fall looks like. It should have a descend of 60 meters but the pictures I see are much smaller. There is also a Reinforsen near Mo i Rana, very confusing.