Pont Aberglaslyn carries the A4085 across the Afon Glaslyn at the entrance to the Aberglaslyn Pass. It is a single span stone arch bridge over the narrow river, which appears to date back to 1656, judging by a datestone discovered in the restoration work carried out in the 1950s. The bridge as seen today, however, probably owes more to the rebuilding in 1796 when it was widened and the roadway raised. The two faces of the bridge are somewhat different, the upstream side having a shaped arch ring with a level string course, while on the downstream side the arch ring is made from smaller stones and the string course is peaked over the arch. This perhaps suggests that the downstream face has some elements of the original 17th Century structure surviving, and that the bridge was widened on the upstream side. The bridge carries a narrow [{S2]] carriageway, although traffic will often pause to allow oncoming traffic to negotiate the tight bends on either bank. The parapets are essentially indistinguishable from the roadside walls which extend for some distance in either direction.
Junction
On the west bank of the river, the A4085 meets the A498 at a simple T junction, the two routes then multiplexing north through the Aberglaslyn Pass to Beddgelert. Both routes are only just wide enough for a centre line, and there are warning signs to try and prevent large vehicles attempting to cross the bridge. Standing opposite the bridge at the junction is an old cottage which was perhaps once a toll house.
