The R336 road is a regional road

Regional road

A regional road in Ireland is a class of road not forming a major route , but nevertheless forming a link in the national route network. There are over 11,600 kilometres of regional roads. Regional roads are numbered with three digit route numbers, prefixed by "R" A regional road in Ireland is a...

 in Ireland

Republic of Ireland

Ireland , described as the Republic of Ireland , is a sovereign state in Europe occupying approximately five-sixths of the island of the same name. Its capital is Dublin. Ireland, which had a population of 4.58 million in 2011, is a constitutional republic governed as a parliamentary democracy,...

. Heading west the route connects the city of Galway

Galway

Galway or City of Galway is a city in County Galway, Republic of Ireland. It is the sixth largest and the fastest-growing city in Ireland. It is also the third largest city within the Republic and the only city in the Province of Connacht. Located on the west coast of Ireland, it sits on the...

 to An Cheathrú Rua (via the R343) through Casla. From Casla the route proceeds north, further into Connemara

Connemara

Connemara is a district in the west of Ireland consisting of a broad peninsula between Killary Harbour and Kilkieran Bay in the west of County Galway.-Overview:...

, passing through Screeb

Screeb

Screeb is a small village in south-west Connemara, County Galway, Ireland. It is located on the R336 regional road, north of Casla and southwest of Oughterard....

 and crossing the N59

N59 road (Ireland)

The N59 road is a national secondary road in Ireland. It commences in County Sligo, south of Sligo Town at the Belladrehid interchange with the N4 north of Ballysadare. The route circles around the west of Ireland, passing west from Sligo into County Mayo and through Ballina. The N59 continues...

 at Maam Cross

Maam Cross

Maam Cross is a crossroads in Connemara, County Galway, Ireland. It lies within the townland of Shindilla.-Transport:*Maam Cross railway station opened on 1 January 1896 and finally closed on 29 April 1935.-See also:...

. It veers NW at Maum

Maum

An Mám is a village in County Galway, Ireland. Its name is Irish for "the pass".-See also:* List of towns and villages in Ireland...

 through Joyces Country past the Maumturk Mountains before terminating in Leenaun

Leenaun

Leenaun , also Leenane, is a village and 1,845 acre townland in County Galway, Ireland. It is on the shore of Killary Harbour , on the northern edge of Connemara and is on the route of the Western Way long-distance trail...

 at the head of Killary Fjord

Killary Harbour

Killary Harbour/An Caoláire Rua is a fjord located in the West of Ireland in the heart of Connemara which forms a natural border between counties Galway and Mayo. It is 16 kilometres long and in the centre over 45 metres deep...

, where it again meets the N59.

The entire route is in west County Galway

County Galway

County Galway is a county in Ireland. It is located in the West Region and is also part of the province of Connacht. It is named after the city of Galway. Galway County Council is the local authority for the county. There are several strongly Irish-speaking areas in the west of the county...

 and is 83 km (51.6 mi) long.

A major upgrade of the road is proposed from Bearna

Barna

Bearna is a Gaeltacht village west of Galway city in County Galway, Ireland, on the R336 regional road. Once a satellite of Galway city, the village is now rapidly becoming one of its suburbs. Officially the village is regarded as Irish speaking and is therefore a constituent part of the regions...

, just west of Galway City to Screeb

Screeb

Screeb is a small village in south-west Connemara, County Galway, Ireland. It is located on the R336 regional road, north of Casla and southwest of Oughterard....

, a distance of 40km.