Is there a train to Caernarfon?

No, the main rail network does not reach Caernarfon.

How long is the drive?

It typically takes 1 hour and 30 minutes.

Yes, the T2 service connects the towns.

Yes, it passes through Snowdonia National Park.

Yes, but the A487 is busy with heavy traffic.

Machynlleth

Caernarfon

Bus Driving

Machynlleth to Caernarfon

Updated: 29 May 2026

The journey from Machynlleth to Caernarfon covers approximately 85 kilometers along the scenic A487 coastal road. Driving is the most efficient method, taking roughly 90 minutes through the Snowdonia National Park. Public transport involves a combination of bus services, which can take significantly longer due to rural stops. You will pass through iconic locations like Harlech and Porthmadog. This route is renowned for its dramatic mountain and sea views.

Total Distance: 85 km driving distance; 65 km straight-line air distance.

Fastest Way

Driving is the fastest, taking 1 hour 30 minutes.

Cheapest Way

Bus travel is the cheapest at approximately 12 GBP.

Compare Machynlleth to Caernarfon Routes

	Bus Connecting	Driving Direct
Duration	3 hours 15 mins	1 hour 30 mins
Avg Price	12 GBP	15 GBP in fuel
Operator	Lloyds Coaches	N/A
Route	T2 service to Porthmadog, then local bus to Caernarfon.	A487 via Dolgellau and Porthmadog.
Tip	Ensure you have exact change or a contactless card for the driver.	Check for road closures on the A487 during winter storms.

Travel Tips

Check Weather
Snowdonia weather changes rapidly; always carry a waterproof jacket.
Fuel Up
Fill your tank in Machynlleth as petrol stations are sparse in the mountains.
Parking
Use the St Helen's Road car park for easy access to the castle.
Bus Timetables
Download the Traveline Cymru app for real-time bus updates.
Photography
Stop at the viewpoint near Harlech for the best photos of the castle.