Heading north for Treriksröset – the three-nation marker post where Sweden, Norway and Finland meet – walk over the bridge to Kaaresuvanto in Finland, from where a daily bus leaves at 2.35pm (Finland is an hour ahead of Sweden) for Kilpisjärvi (journey time 1hr 40min). From June to mid-September a second daily bus leaves at 4.25pm for Tromsø in Norway, travelling via Kilpisjärvi. From Kilpisjärvi, there are two ways to get to Treriksröset. One of these is a hike of 11km down a track which passes through an area of dwarf woodland before running around a small lake to reach Sweden’s northernmost point; don’t forget your camera and mosquito repellent. Alternatively, you can shorten the hike to just 3km by taking a boat ride from Kilpisjärvi across the lake on M/S Malla (late June–early Aug 10am, 2pm & 6pm Finnish time; 45min; €25 return); note that the boat requires at least four passengers to sail.
From Treriksröset, the path continues (14km) towards the northernmost peak in Sweden, Pältsan (1445m); the going here is rocky in parts. The STF cabins (no advance booking; March, April & late June–early Sept; dorm beds 390kr) at the foot of the mountain boast thirty beds and a sauna. There’s an easy hike (40km) from the cabins to Keinovuopio, where you cross the river to the village of Peera, on the main E8 road in Finland; from here you can catch the bus back to Karesuando (daily at approximately 1.45pm, also June to mid-Sept daily at 11.25am; check Finnish bus times at w matkahuolto.fi).