The Suzuki Midnight Sun Run starts on the road Engjavegur close to Laugardalshöll Sports Hall and the ice skating rink in Laugardalur. The race ends on a path by the Park and Zoo (Husdyragardurinn) in Laugardalur. Half marathon and 10 k race start at 21:00 and the 5 k race starts at 21:20. The race is mostly on paths. On the following picture, you can view the start and finish area. This map is from last years event and will be updated if needed when it gets closer to the event.
You can see the course map here.