If you're in and around North Wales this weekend, don't be too surprised if you see a few classic cars on the roads, as the Three Castles Welsh Classic Trial is taking place.

The event has been run annually since 2003, and is based around the seaside town of Llandudno (pictured above). Just over 100 cars, ranging from 31 years old to 80 years old will cover the 500-mile course, over four days, June 5 to 9.

The event may be called a rally, but it is most definitely no race, rather it's more a social event for classic car owners and fans. Amongst the cars taking part are examples of MG TD, MGA, Austin-Healey 100/4, Austin-Healey 3000, Aston Martin DB5, Jaguar KK120, Austin Mini Cooper S, Porsche 911, Triumph TR4, Abarth 750GT, Maserati 3500GT, and more.

For those interested in catching some of the classic cars action, here's the timetable. Please note, the organisers advise that you not attempt to follow the rally on the road, instead pick a place along the route, or make your way to the meeting points.

And the event timetable is:

Wednesday 6th June

The rally travels south-west, then down the Lleyn Peninsula, reaching Caernarfon Castle in the afternoon.

07.00 – 08.45 Llandudno Promenade: Cars leave the start & Concours D'Elegance judging.There’ll be plenty to see along the promenade this morning from about 06.45 as crews prepare for the start.

16.15 – 18.00 approx. Caernarfon Castle: View a short driving test on the quayside, then see the cars and chat to entrants down by the water as they finish the first day. No access to Castle.

Thursday 7th June

The rally travels west, across to Anglesey, reaching Beaumaris Castle in the afternoon.

07.00 – 08.45 Llandudno Promenade: Cars leave the start & Concours D'Elegance judging. There’ll be plenty to see along the promenade this morning from about 06.45 as crews prepare for the start.

9.45 - 11.30 approx. Anglesey Circuit: A good chance to see a series of three driving tests on the circuit. Free admission: refreshments and toilets.

13.50 – 15.35 approx. Beaumaris Green: See the cars and chat to entrants down by the water as they finish the second day. No access to Castle.

Friday 8th June

The rally runs east then crosses the high passes of Snowdonia, returning to finish the day at Conwy Castle.

07.00 - 08.45 Llandudno Promenade: Cars leave the start for day three. There’ll be plenty to see along the promenade this morning from about 06.45 as cars start day 3.

08.30 - 10.15 approx. Glan y Gors Kart Circuit: A chance to see cars and entrants as they stop for coffee, and tackle a fine driving test with good viewing.

17.30 - 19.15 approx. Conwy Castle: See the cars and chat to entrants as they finish the second day. No access to Castle.

Saturday 9th June

The rally travels east today, visiting several stately homes then returning to finish on Llandudno Promenade.

07.00 - 08.45 Llandudno Promenade: Cars leave the start for day three. There’ll be plenty to see along the promenade from about 06.45 as cars leave the start for the final day.

08.20 – 10.05 Bodelwyddan Castle: A driving test using the lower car parks. Easy viewing. Why not stay, visit the house and have lunch at the castle?

13.45 – 15.30 approx. Llandudno Promenade 115/ 790 822See the cars as they finish the rally on the Promenade. Watch there or chat to entrants after they take the Ceremonial Finish on the Promenade opposite the Imperial, where they will be greeted by TV’s Sian Lloyd.