Best family days out in Gwynedd: walks, forests and National Trust picks

Gwynedd offers some of the most varied family walking in Wales, from Snowdonia's gentlest forest paths to the Llŷn Peninsula's coast. This guide picks the routes worth your weekend, with practical detail on parking, terrain, distance and what's nearby for an after-walk lunch or stay.

Accessible and short family walks

Not every day out needs to be a boots-and-rucksack affair. The Benar Boardwalk at Morfa Dyffryn National Nature Reserve is rated 'Access for All' and is a wooden boardwalk taking just 10 minutes return, making it one of the most inclusive short walks in the area. The reserve sits near Barmouth and combines sand dunes with a seashore, so small children have plenty to explore once the boardwalk itself runs out.

For families with slightly older children who want a short but rewarding route, the Branwen Walk at Harlech is a 5km circular taking around two hours at a relaxed pace. It is rated moderate, but the gradient is manageable and the views are the reward: panoramic stretches across Bae Ceredigion with Castell Harlech visible from the route. The circular format means no retracing steps, which matters when you are keeping smaller legs moving.

One practical point: 64.4% of Gwynedd's population reported being able to speak Welsh in the 2021 census. Place names on trail signs are often Welsh-only. Download an offline map before setting off, particularly on less-visited routes.

Moderate hiking adventures for active families

If your children are comfortable walking 6-10km and you want routes with something specific to look at, several options stand out within Eryri.

The Rhosgadfan Circular covers 9.5km near Caernarfon and has designated parking spaces. The route passes historic quarries and offers elevated viewpoints. The quarry context gives older children something to focus on beyond step-counting, and the parking removes the usual scramble for roadside space on a busy weekend.

Bwlch Drws Ardudwy is a 7km circular taking roughly two hours, leading into the foothills of the Rhinog mountain range. Abergwynant Woods is a similar commitment at 6km and two hours, routing through ancient woodland. The Clogau Trail also comes in at 6km, rated moderate. For families wanting a longer day, Arthog Falls & Cregennan Lakes covers 13.7km over four hours, passing through ancient woodlands before tracking along the Mawddach Estuary. Plan this one for a day with a reasonable forecast; there are no facilities on route, so carry food and water from the start.

Gwydir Forest Park: outdoor activities and picnics

Waymarked trails in Gwydir Forest Park start from Betws-y-coed and several Natural Resources Wales car parks, which makes planning straightforward. Pick a car park close to the activity you want, and the trails fan out from there.

The activities divide roughly into three categories: picnic-and-walk combinations around the lakes, mountain biking, and heritage trails with a bit of industrial or Roman history attached.

For picnics, Llyn Geirionydd near Llanrwst has a designated picnic site with a walking trail around two lakes. Llyn Sarnau, also near Llanrwst, has a picnic spot with a walk to two scenic lakes. Llyn Crafnant near Llanrwst has accessible riverside trails. For families with a mix of ages and energy levels, the lake settings work well as an anchor point: the picnic area is there whenever anyone needs a break, and the walking trail extends as far as the group wants to go.

The forest is particularly useful when the family has mixed interests. A parent or teenager who mountain bikes can head to Sawbench near Llanrwst, which has two trails alongside walking routes, or to Penmachno near Betws-y-coed, where remote mountain bike trails come with extensive views. Younger children can stay on the lake walk without anyone feeling short-changed.

Two routes stand out for historical interest. The trail at Ty'n Llwyn near Betws-y-coed leads to Swallow Falls. At Dolwyddelan near Betws-y-coed, you can follow a walking trail along a Roman road, with a cycle trail option and mountain views alongside. The Cyffty Mine trail near Llanrwst is a short loop around an abandoned lead mine, which tends to hold children's attention more reliably than a standard woodland walk without context.

Dyfi Forest near Machynlleth provides an alternative at the southern end of the area, with a riverside picnic site at Foel Friog and woodland walking at Tan y Coed.

National Trust properties with play areas

For days when you want a destination with clear facilities rather than a trailhead with a map, three National Trust properties in the area have specific family infrastructure.

Plas Newydd House and Garden has an adventure play area in Dairy Wood, a treehouse, and an Arboretum trail. The play area occupies younger children for a couple of hours while adults explore the grounds at their own pace.

Penrhyn Castle and Garden has a natural woodland play area and a wooden hide for spotting wildlife. The hide gives children a focused activity during the garden visit rather than simply being towed from one feature to the next.

Plas yn Rhiw on the Llŷn Peninsula has a cottage garden with sea views and a self-led Pollinator trail in the meadow. It is rated one pawprint by the National Trust, meaning dogs are welcome. The trail is self-directed, so you can take as long or as short as the family wants on it.

National Trust membership covers entry to all three for the year. If you are planning more than two or three visits to Trust properties across Wales, the membership maths usually works out.

Weather contingency and preparation

North Wales weather is genuinely unpredictable, and Gwynedd sits in a part of the country that can see rain at any time of year. Most family days out guides gloss over this; the practical split matters.

Some routes cope well with wet conditions; others become uncomfortable or slippery. The Benar Boardwalk at Morfa Dyffryn is a 15-minute return on a wooden boardwalk and is manageable in light rain. The lake trails at Gwydir Forest are well-maintained and workable in drizzle with waterproofs. The longer mountain routes, particularly Arthog Falls & Cregennan Lakes at 13.7km and Bwlch Drws Ardudwy into the Rhinog foothills, need dry conditions underfoot. Reassess these if the morning forecast looks poor.

For partial shelter, the Cyffty Mine trail at Gwydir Forest provides some natural cover in the mine area itself. The National Trust properties at Penrhyn Castle and Plas Newydd House include indoor sections within the buildings, worth building into the plan on a fully wet day. Check opening times directly with the National Trust before travelling.

Parking is worth planning ahead. Rhosgadfan Circular has designated parking spaces. Gwydir Forest Park has Natural Resources Wales car parks at several locations, with trails starting from Betws-y-coed among other points. Morfa Dyffryn NNR is near Barmouth, which has town-centre parking nearby. On bank holidays and summer weekends, popular trailheads fill early; arriving before 9am removes most of the stress.

Carry food and water for any route over 5km. Pack a waterproof layer regardless of the morning forecast. Download your route offline before you leave. These three steps remove the majority of problems that cut family walks short in Gwynedd.

Make a day of it

If you're making a day or weekend of it in Gwynedd, the North Wales Local directory lists B&Bs, hotels and self-catering and pubs and restaurants across the area. It's a good way to find local options in one place when you're planning your trip.

FAQ

Are there accessible family walks in Gwynedd?

Yes. The Benar Boardwalk at Morfa Dyffryn National Nature Reserve is designated 'Access for All' and is a wooden boardwalk, with the return trip estimated at 15 minutes. It sits near Barmouth and the reserve includes sand dunes and a seashore. Gwydir Forest Park also has accessible riverside trails at Llyn Crafnant near Llanrwst, which follow the riverside rather than climbing and are manageable for most mobility levels.

What are the best family-friendly hikes in Snowdonia?

Several moderate routes within Eryri work well for families. The Branwen Walk in Harlech is 5km and takes around two hours, with views across Bae Ceredigion and Castell Harlech. The Rhosgadfan Circular near Caernarfon is 9.5km with designated parking and passes historic quarries. Abergwynant Woods is a 6km circular through ancient woodland, also rated moderate and estimated at two hours.

Does Plas yn Rhiw allow dogs?

Yes. Plas yn Rhiw on the Llŷn Peninsula is rated one pawprint by the National Trust, indicating it welcomes dogs. The property includes a cottage garden with sea views and a self-led Pollinator trail in the meadow. As with any National Trust property, check current access conditions on the National Trust website before you travel, as policies on specific areas can vary by season.

Where is the best place to picnic in Gwydir Forest Park?

Llyn Geirionydd near Llanrwst has a designated picnic site with a walking trail around two lakes. Llyn Sarnau, also near Llanrwst, has a picnic spot with a walk to two scenic lakes. For accessible riverside picnicking, Llyn Crafnant near Llanrwst has riverside trails alongside the picnic area. All three are reachable from Natural Resources Wales car parks, with waymarked trails starting at the car parks.

What family activities are available at Penrhyn Castle?

Penrhyn Castle and Garden has a natural woodland play area for children and a wooden hide for wildlife spotting. The play area gives younger children somewhere to run freely while the hide offers older children a focused activity. The castle and garden are a National Trust property, so membership covers entry. It is a practical choice for a half-day out in northern Gwynedd.

How long does the Branwen Walk take?

The Branwen Walk is a 5km circular route based in Harlech, rated moderate and estimated at approximately two hours. It offers panoramic views across Bae Ceredigion, with Castell Harlech visible from the route. The circular format means you return to the start without retracing the same ground, which tends to work better for families with children who lose interest on out-and-back routes.

Are there indoor family attractions in Gwynedd for rainy days?

The most practical options involve the National Trust properties listed above. Penrhyn Castle and Plas Newydd House both have indoor sections accessible on a wet day. The Cyffty Mine trail at Gwydir Forest near Llanrwst is a short loop around an abandoned lead mine and provides natural shelter. The Benar Boardwalk at Morfa Dyffryn NNR near Barmouth is a 15-minute return on a wooden boardwalk and is manageable in light rain.