North Karelia is in the Finnish Lakeland.
North Karelia is surprisingly far away from southern Finland, and for instance a drive from Helsinki to Joensuu will take about six hours – almost as long as up to Oulu.
The main roads, anticlockwise from the north, lead in from Kuhmo (road 75), Kajaani (6), Iisalmi (87), Kuopio (9, 75), Varkaus (23), Savonlinna (71) and Imatra (6). From Helsinki, use road 4 (to Jyväskylä, then road 9 to Kuopio), 5, 6 or 7.
The Blue Highway leads through the region by road 9, continuing across the Niirala/Värtsilä border crossing to Sortavala and Petrozavodsk. For other border crossings you have to come via Kuhmo (across from Kostomuksha) or Imatra (from Vyborg). From Saint Petersburg, choose between Nuijamaa (Lappeenranta), Imatra and Niirala.
You can fly directly to Joensuu from Helsinki; Joensuu Airport 📍 (IATA: JOE) is located 11 kilometers northwest of the city centre. Also you can fly to Helsinki (IATA: HEL) and continue by bus or train. Lappeenranta (IATA: LPP) has some international flights, most of them operated by Ryanair.
There are two long distance railroads terminating in Joensuu; one from Helsinki to Lappeenranta and along the border up to Joensuu and another going west–east through the country, via Jyväskylä and Pieksämäki. If you are going to Lieksa or Nurmes you can continue by local train from Joensuu. See VR.
There are coach connections from cities and towns in other parts of Eastern Finland, most notably from Kuopio and Lappeenranta, as well as coaches connecting Helsinki with Joensuu, see Matkahuolto.
The trains are useful on some routes, see above. From Joensuu there are connections towards Nurmes, Kitee and Heinävesi.
Coaches have a reasonably dense network of services. See Matkahuolto. The governmental ELY-keskus has schedules for some regional traffic (here: Waltti).
North Karelia region is a safe place.