Nýidalur is located roughly in the middle of the Sprengisandur route (F 26) which connects north and south Iceland through the central highland. Its high altitude means that it is not accessible by normal vehicles except during summer and early autumn. The Iceland Touring Association runs accommodation huts in Nýidalur. A ranger station is also located there, but that‘s about it. No fuel, food or other commodities are available in Nýidalur or anywhere nearby.
Hiking paths leads from Nýidalur to Vonarskarð. The northern end of Vonarskarð pass can be reached via a track trom Dyngjufjallaleið (F 910) west of Skjálfandafljót, ending at a car park by Gjósta. The southern end of the pass can be reached from a track which turns off Sprengisandsleið (F 26) at Skrokkalda by Hágöngulón, ending at a car park between Kolufell and Svarthöfði.
Access to Tungnaáröræfi is by the mountain road F 229 from Veiðivötn, or by a track from Sprengisandsleið (F 26) to Þórisós.