This is a three-day mountain endurance challenge covering roughly 26 miles and more than 11,500ft of ascent. You link the Carneddau, Glyderau, and Snowdon massif with qualified Mountain Leaders who live and work in these hills. Days are long, starts are early, and the route is planned as a continuous challenge rather than three unrelated tourist walks. Expect big ascent, cumulative fatigue, and a steady focus on pacing, nutrition, and group movement so the full 3000s objective stays realistic.
Day one is a long Carneddau traverse from the north of the park back toward Ogwen. You meet at 07:30 opposite Glan Dena hut on the A5, travel by minibus to the northern start, then work south through the northern Carneddau summits over about eight hours and around 19km with roughly 1000m of ascent. Your leader manages pace, navigation, and group spacing on open plateau ground before you finish back toward the Ogwen Valley and your vehicles.
Day two takes in Tryfan and the Glyderau with easy scrambling and the longest hours. Meet at 08:00 at Ogwen Valley Visitor Centre for around 17.6km and 1345m of ascent, often 9 to 11 hours depending on conditions and group pace. Cut-off times are explained at the start so everyone understands how the day is managed. You finish in Nant Peris with transport arranged back to Ogwen vehicles.
Day three aims for the Snowdon horseshoe peaks, including Crib Goch when wind and rain allow, finishing back at Pen y Pass. Meet at 08:00 at Pen y Pass for around seven hours aiming for Crib Goch, Crib y Ddysgl, Carnedd Ugain, and Yr Wyddfa when weather allows. If summit gusts are too high or rain and wind combine, the ridge is skipped and you still summit key peaks by safer lines, protecting the group without abandoning the core 3000s objective.
Leaders are fully qualified Mountain Leaders with deep day-and-night local knowledge built over years of running this event. Ratios and logistics are planned for long days, cut-offs, and weather-aware ridge decisions, including minibus support on key transfer legs so energy goes into the mountains rather than awkward car shuffles.
You get clear joining instructions about two weeks before the start, practical kit guidance for bog, rock, and easy scrambling, and honest route choices that protect the group when summit winds make Crib Goch unsafe. The challenge stays ambitious, but decisions stay grounded in local conditions and group safety rather than a fixed photo itinerary.
Meet at 07:30 opposite Glan Dena hut on the A5, then travel by minibus to the northern start for the Carneddau day. Expect around 19km and 1000m of ascent over about eight hours as you work south through the northern Carneddau summits.
Your leader manages pace, navigation, and group spacing on open plateau ground. You finish back toward the Ogwen Valley and your vehicles after a full first day of the challenge.
Meet at 08:00 at Ogwen Valley Visitor Centre for Tryfan and the Glyderau. This is often the longest day at around 17.6km and 1345m of ascent, with easy scrambling and cut-off times explained by your guide at the start.
Expect 9 to 11 hours depending on conditions and group pace. You finish in Nant Peris with transport arranged back to Ogwen vehicles.
Meet at 08:00 at Pen y Pass for the Snowdon massif day, aiming for Crib Goch, Crib y Ddysgl, Carnedd Ugain, and Yr Wyddfa when weather allows. If summit gusts are too high or rain and wind combine, the ridge is skipped and you still summit key peaks by safer lines.
Allow around seven hours for this round trip finishing back at Pen y Pass. Pre-book parking where required and pack for a final committing mountain day.
Day 1 meets at 07:30 opposite Glan Dena Mountaineering hut on the A5 in the Ogwen Valley, then a minibus takes you to the northern start. Day 2 meets at 08:00 at Ogwen Valley Visitor Centre. Day 3 meets at 08:00 at Pen y Pass, where online parking pre-booking is required.
Final joining instructions about two weeks before the event confirm exact pins, parking, and any convoy or transport notes. Allow extra time for early starts.
This challenge suits adults with strong general hiking fitness and prior full mountain days. A useful benchmark is reaching Snowdon summit from Pen y Pass via the Miners Path in 2.5 hours or less while carrying an 8-10kg pack.
Weekly endurance training helps. You should be ready for long days, early starts, and cumulative fatigue across three mountain ranges.
This event is aimed at adults. The days are long, include easy scrambling on day two, and may include Crib Goch on day three when weather allows.
Ask the team before you book if you have age or fitness questions for your party.
Day 1 meets at 07:30 opposite Glan Dena Mountaineering hut on the A5 in the Ogwen Valley, with a minibus to the northern start. Day 2 meets at 08:00 at Ogwen Valley Visitor Centre. Day 3 meets at 08:00 at Pen y Pass.
Final joining instructions arrive about two weeks before the start and confirm pins, parking, and any transport notes.
Around 26 miles and more than 11,500ft of ascent across 14 or 15 summits over 3000 feet, split across the Carneddau, Glyderau, and Snowdon massif. Day lengths are roughly 8 hours, 9-11 hours, and 7 hours.
Day 2 includes easy scrambling on Tryfan and the Glyderau. Day 3 aims for Crib Goch when wind and rain allow.
You need endurance for three consecutive long mountain days with big ascent and little recovery. Train with weekly hard hill days, not only flat walks.
If the Miners Path fitness benchmark already feels tough, build more training before committing to this event.
Bring clothing and footwear for bog, dry rock, rocky hiking, and easy scrambling, plus layers for Welsh mountain weather. A full kit list is sent before the challenge.
Pack plenty of food and water each day, especially for the longer Glyderau day with its cut-off times.
On day 3, if summit gusts are above about 25mph or rain with high winds is forecast, the team will not take the group on Crib Goch. You can still summit Yr Wyddfa and Carnedd Ugain.
Route decisions may be made the evening before or on the morning of the day. The team will be in touch if plans need to change.
Accommodation is not included. Stay nearby in hubs such as Capel Curig, Betws-y-Coed, or Llanberis so early meets are realistic.
Book flexible lodging in case daily start points need a small shift with conditions or logistics.
Day 1 includes a minibus drop-off at the northern start. Day 2 includes transport back from Nant Peris to your vehicle in Ogwen. Your travel to each daily meeting point is not included.
Budget for parking, including pre-booked Pen y Pass parking on day 3.
A minimum of three clients is normally needed for the event to run, or it can be offered as private guiding for one or two people. Exact capacity for your date shows in live availability.
Days are led by qualified Mountain Leaders with strong local knowledge day and night.
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About the centre
Ogwen Valley
Operated by Snowdonia Adventures, a partner of adventuro.
Cheshire, United Kingdom
From £699
Highlands & Islands, United Kingdom
From £280
North Wales, United Kingdom
From £199
