Crossroads at Llanfihangel-ar-Arth
The B4336 is a rural B-road in northern Carmarthenshire.
Its original western end was on the A486 in Pont-twyeli. The A486 now bypasses the area and the B4624 has taken its route except for the section immediately west of the former A486/B4336 junction which was bypassed in the 2010s. The current western end of the B4336 is at the B4624 TOTSO at the end of the bypass.
The B4336 heads eastwards. It runs parallel to the Tyweli River as far as Penlan before crossing a hill to Llanfihangel-an-arth where it is the main road at a crossroads with the B4459. Another hill is crossed before the B4336 terminates at Llanllwni at a T-junction on the A485.