From OSLO: E-18 from Oslo to Drammen, E-134 by Kongsberg and Notodden to Høydalsmo. Rv. 45 from Høydalsmo to Dalen. This is Suleskarvegen (http://www.suleskarvegen.no/) (season-open road between Oslo and Stavanger)
From BERGEN: Rv. 7 to Nordheimsund, and from Nordheimsund you drive Rv. 49 to Tørvikbygd. Take the ferry to Jondal. Drive to Odda by Rv. 550 heading south-east. From Odda take Rv. 13 to Seljestad, and take E-134 to Drammen. In Åmot you take Rv. 38 to Dalen.
From HAUGESUND: E-134 by Røldal to Drammen. In Åmot you take Rv. 38 to Dalen.
From STAVANGER: Suleskarvegen (http://www.suleskarvegen.no/) season open. Outside season: E-39 to Rennesøy, ferry from Mortaviga to Arsvågen. Follow E-39 to Aksdal, then E-134 to Åmot and Rv. 38 to Dalen.
From KRISTIANSAND: Drive through Setesdalen at Rv.9 to Rotemo, shortly after passing Valle. Drive Rv. 45 over Skafsåheia to Dalen.
From ARENDAL: Follow E-18 in 21 km heading for Oslo, take off at Rv. 415 going to Åmli, then Rv. 41 to Brunkeberg. E-134 from Brunkeberg to Høydalsmo, and Rv. 45 to Dalen.
From LARVIK: E-18 from Larvik to Porsgrunn heading to Kristiansand. From Porsgrunn take Rv. 36 to Skien and Seljord. From Seljord drive E-134 to Høydalsmo, then Rv. 45 to Dalen.
From Sandefjord. E-18 to Larvik and Porsgrunn heading to Kristiansand. From Porsgrunn take Rv. 36 to Skien and Seljord. From Seljord drive E-134 to Høydalsmo, then Rv. 45 to Dalen.
By bus:
Haukeliekspressen and Telemarkekspressen, combined with local bus-services, take you to Dalen from Oslo/Gardermoen, Sandefjord/Torp, Larvik, Haugesund, Bergen. Buss-change in Åmot. See timetable for local bus-service, timetable for Haukeliekspressen or timetable for Telemarkekspressen.
By train:
From Oslo, Stavanger and Kristiansand, you can take the train to Bø, and from Bø take Haukeliekspressen or Telemarkekspressen.
to Åmot. Change to local bus in Åmot to Dalen. For tickets see the website of VY.
By boat:
Enjoy the waterways on a fairytale boat travel on the Telemark Canal 105 km long from Skien to Dalen, from coastal to mountain landscape.