The R236 road runs in County Donegal in Ulster, and links Stranorlar, via Convoy and Raphoe, to St Johnston and Carrigans, becoming the A40 into Derry in Northern Ireland.

The R236 then runs through farmland via the townland of Killynure, crosses Glasly Bridge, which takes it across the Burn Dale, and continues on via Convoy and Raphoe.

The R236 joins the N14 at a T junction for a short length running north from the Lifford and Strabane direction to Letterkenny, before another T junction leaving the main N14 and running via Carrickdawson, Momeen, Magheraghcloy, Castletown.

In Tullyowen the R265 (linking southwards to Rossgeir near Lifford) and that road number is in St Johnston before the northward parting of the ways in Dundee with the northwestward R265 running to Newtown Cunningham and the N13 at Castleforward Demesne, whilst the R236 runs northeastward.

The R236 runs via Carrigans before becoming the A40 when the border with County Londonderry is reached with the road linking Derry.