Eryri (Snowdonia) is one of Britain’s great outdoor playgrounds. The combination of high mountains, ancient rock, glacial lakes, fast-flowing rivers and a coastline within easy reach makes it a destination for almost every type of outdoor pursuit, from gentle family cycling along converted railway paths to technical winter mountaineering on Crib Goch, and from early-morning wild swimming in mountain lakes to long trail runs along ridgelines with views to Ireland.
This section covers the major activities available across the national park. A hard physical objective, a creative pursuit, or simply a different way to see the landscape: Eryri offers exceptional opportunities for all of them. Our adventure guide from coast to mountain is a good overview, and Eryri vs the Alps compares a Welsh mountain holiday with an Alpine one.
Activities at a Glance
| Activity | Where to start | Best season | Experience needed |
|---|---|---|---|
| Photography | Llynnau Mymbyr, Llyn Padarn, Cwm Idwal | All year; autumn and winter light are special | None for valley spots |
| Trail Running | Valley trails, then the Pyg Track and ridges | Late spring to autumn | Mountain fitness and navigation for high routes |
| Wild Swimming | Llyn Padarn, Llyn Gwynant, mountain lakes | Mid to late summer | Cold-water confidence; never swim alone |
| Scrambling | Tryfan, Bristly Ridge, Crib Goch | Dry summer days | Solid hillwalking first; a guide or course recommended |
| Cycling | Mawddach Trail, Lôn Gwyrfai, Coed y Brenin | All year at trail centres | From family-friendly to expert |
| Winter Walking | Low-level routes first; summits only with winter skills | Roughly November to April | Ice axe and crampon skills for high ground |
The Activities
Photography
Mountains, lakes, light and landscape: a photographer’s guide to Eryri. The classic shots are the Snowdon Horseshoe reflected in Llynnau Mymbyr, Tryfan from Llyn Ogwen and Dolbadarn Castle above Llyn Padarn, but changeable weather means the best pictures often come on days that start badly. Our deeper Snowdon photography guide covers viewpoints and timing.
Trail Running
From the Snowdon Race to long mountain routes across the ranges. Lower valley paths around Llanberis, Beddgelert and Betws-y-Coed make good warm-ups before committing to the high ground, where you need to carry enough kit to stop safely if the weather turns.
Wild Swimming
The best mountain lakes and river pools for open water swimming. Even in summer the water is cold enough to cause cold water shock, so enter slowly, stay close to the shore, swim with others and avoid reservoirs and fast rivers.
Scrambling
Crib Goch, Tryfan and the great ridges, where walking becomes climbing. Graded scrambles range from hands-on walking to near rock-climbing, and the consequences of a slip are serious. Learn on easier ground or with a qualified guide.
Cycling
Road, trail and mountain biking routes across the national park. The Mawddach Trail between Dolgellau and Barmouth and Lôn Gwyrfai between Rhyd Ddu and Beddgelert suit families, while Coed y Brenin, described by the national park as the first purpose-built mountain biking centre in Britain, has trails for every level. On Yr Wyddfa, a voluntary agreement asks cyclists not to ride to or from the summit between 10am and 5pm from 1 May to 30 September.
Winter Walking
Snowdon and Eryri in winter: conditions, equipment and the best routes. In snow and ice the summits become serious mountaineering terrain, and mountain rescue teams are kept busy with incidents that better preparation could often have avoided. A winter skills course is the best investment you can make.
Why Eryri for Outdoor Activities?
The geological variety of Eryri (ancient volcanic rock on Snowdon and Tryfan, the great sweeping ridges of the Carneddau) creates different challenges and rewards for different pursuits. The density of good mountain terrain within a small area means it is possible to combine activities in a single visit: a morning scramble on Tryfan, a swim in Llyn Ogwen in the afternoon, and evening photographs of the light on the Glyderau. Few areas in Britain offer this concentration of quality across so many different disciplines. If you want them combined into one big day, see our guide to multi-activity challenge events, and for organised walking there are walking festivals through the year.
For more ideas, the Adventure category of the Snowdonia 100 includes zip lining at Penrhyn Quarry, kayaking on Llyn Padarn and rock climbing on the Idwal Slabs.
Planning and Safety
- Check the forecast. Use a mountain-specific forecast such as the Met Office mountain forecast or MWIS, not a town forecast. Wind and cloud on the tops are what usually spoil plans.
- Book instruction if you are new. Climbing, scrambling, kayaking and winter skills are all best learned with qualified, insured providers.
- Have a wet-weather plan. Our rainy day guide lists indoor and low-level alternatives.
- Know who to call. In an emergency, call 999 and ask for Police, then Mountain Rescue; on the coast, ask for the Coastguard.
See our mountain safety guide and what to wear guide before any day on the hills.
Frequently Asked Questions
What is the best activity for a first visit?
A good valley or lake walk combined with a cycle on the Mawddach Trail or Lôn Gwyrfai gives a real feel for the landscape without needing specialist skills.
Can I cycle up Snowdon?
The bridleways are open to cyclists, but a voluntary agreement asks riders to avoid the summit between 10am and 5pm from May to September. Outside those times, ride considerately and give way to walkers.
Is wild swimming safe in Eryri?
It can be, with care. The lakes are cold all year, depths change suddenly and weather can turn quickly. Never swim alone, wear a bright hat or tow float, and get out before you feel cold.
Do I need a guide for scrambling?
Not legally, but if you have not scrambled before, a day with a qualified guide is the safest way to learn the skills and judgement these routes demand.
