In Middle-Norway roads and rails meet, coming from north, south and east. Both plane, train and car are adequate means of transportation to get here.
Trondheim airport is just 90K south of Steinkjer, and the onwards journey is just 90 minutes by train or bus. There is a train stop at the airport and trains leave every hour.
Steinkjer is well connected by rail, as part of the Nordland track. Every hour trains leave and arrive to/from Trondheim. In Trondheim you can make connections to Sweden and Southern Norway.
E6 passes through Steinkjer. This is a road starting in Trelleborg, in Southern Sweden and ending in Kirkenes in Northern Norway. From the east, follow E14 to Trøndelag.
Steinkjer is located at the inner end of Trondheimsfjorden, making boats an option. However, no public marine transportation is available. If you sail yourself, Steinkjer can offer a marina.