Abergwyngregyn via Llyn Anafon up Garnedd Uchaf: route map, distance and time
925 m · Snowdonia
A hard mountain walk to the summit from Abergwyngregyn mountain-road track junction.
Abergwyngregyn via Llyn Anafon starts at about 259 m and gains 757 m over 8.0 km to 916 m on the track. The first kilometre climbs 136 m. The steepest kilometre is the one ending at 6 km, which climbs 216 m at an average of 22%. The final kilometre eases to the top. About 19% of the way is steeper than 1 in 5, so expect hands-on-knees going and a slow descent.
Abergwyngregyn via Llyn Anafon at a glance
| Distance | 8.0 km one way, to the top |
|---|---|
| Ascent | 770 m |
| Climb on the track | 757 m up, 103 m down on the way |
| Start and top of the track | 254 m to 938 m (summit 925 m) |
| Steepest 500 m | About 25%, from 0.6 km |
| Steeper than 1 in 5 | 19% of the way |
| Time up | 2h 55m by Naismith's rule |
| There and back | 4h 30m, down the same way |
| Grade | Hard |
| Start | Abergwyngregyn mountain-road track junction, LL33 0LP |
| Start grid reference | SH 680 720 |
| Summit grid reference | SH 686 669 |
| Parking | Aber Falls upper car park; the postcode is approximate |
Abergwyngregyn via Llyn Anafon map
The track from the start (green) to the summit (blue), with a marker at each kilometre.
Height profile and getting to the start
Near the start
From OpenStreetMap, within 2 km. Check opening times before you rely on them.
Download the Abergwyngregyn via Llyn Anafon GPX
Ascent only: plan your way down. A planning track, not checked on the ground; it doesn't show safe scrambling moves. Track data © OpenStreetMap contributors (ODbL), heights from a terrain model.
Abergwyngregyn via Llyn Anafon kilometre by kilometre
Height, climb and average gradient for each kilometre of the track, with a grid reference at the end of each one to check your position on the map.
| At | Height | Climb | Gradient | Grid ref |
|---|---|---|---|---|
| 1 km | 395 m | +136 m | 14% | SH 682 716 |
| 2 km | 377 m | -18 m | -2% | SH 691 712 |
| 3 km | 418 m | +41 m | 4% | SH 698 705 |
| 4 km | 498 m | +80 m | 8% | SH 699 698 |
| 5 km | 680 m | +182 m | 18% | SH 704 689 |
| 6 km | 896 m | +216 m | 22% steep | SH 699 683 |
| 7 km | 909 m | +12 m | 1% | SH 693 675 |
| 8 km | 916 m | +8 m | 1% | SH 687 669 |
How long Abergwyngregyn via Llyn Anafon takes
| Pace | To the top | There and back |
|---|---|---|
| Brisk 6 km/h, 8 min per 100 m up | 2h 20m | 3h 40m |
| Steady (Naismith) 5 km/h, 10 min per 100 m up | 2h 55m | 4h 30m |
| Relaxed 4 km/h, 12 min per 100 m up | 3h 30m | 5h 30m |
Times leave out stops. Coming down the same way, the table counts the ascent once; steep descents on rough ground can be as slow as the climb.
- Today: sunrise 07:49, sunset 18:11. Start by 12:41 to be down before dark, allowing 4h 30m for the walk and an hour for stops.
- Tomorrow: sunrise 07:51, sunset 18:09. Start by 12:39 to be down before dark, allowing 4h 30m for the walk and an hour for stops.
Garnedd Uchaf summit weather for this route
-
Marginal Today Monday 19 October
Slight rain, up to 6°C at the summit, feeling as cold as -2°C, summit wind 28 mph gusting 34 mph, 73% chance of rain. Rated Marginal. Sunrise 07:49, sunset 18:11.
-
Marginal Tomorrow Tuesday 20 October
Light drizzle, up to 6°C at the summit, feeling as cold as -4°C, summit wind 15 mph gusting 19 mph, 78% chance of rain. Rated Marginal. Sunrise 07:51, sunset 18:09.
Best day of the next seven for Abergwyngregyn via Llyn Anafon: Tuesday 20 October, with summit gusts around 19 mph and a 78% chance of rain.
Cloud inversion tomorrow morning: 44% (Marginal), best around 08:00.
Hour-by-hour Garnedd Uchaf forecast
Before you go, also check: MWIS Snowdonia forecast · Met Office mountain forecast.
What to take today
- An insulated jacket, hat and warm gloves: it feels like -2°C on top.
- Waterproof jacket and overtrousers: 73% chance of rain.
- A windproof layer, and poles for balance in gusts to 34 mph.
- Map and compass, and the skills to use them. A phone is a backup, not a plan.
- A head torch, food, water, a charged phone and a small first aid kit.
About Garnedd Uchaf
More about Garnedd Uchaf, with the live forecast.
Challenges that include Garnedd Uchaf
- Welsh 3000s · 15
- Welsh 100 Challenge · 100
- Snowdonia 900m Peaks · 16
- Carneddau Traverse · 7
- Furths · 34
- Hewitts · 523
- Nuttalls · 442
More walks from Abergwyngregyn mountain-road track junction
Routes in Peakify's guides that start within 500 m of this one, for another day from the same car park.
- Abergwyngregyn via Drum via Drum and northern ridge up Carnedd Llewelyn
- Abergwyngregyn via Drum via Drum and northern ridge up Foel Grach
- Abergwyngregyn via Drum via Drum and northern ridge up Foel-fras
- Abergwyngregyn via Llyn Anafon up Foel-fras
- Drum from Abergwyngregyn up Drum
- Abergwyngregyn via Drum and Foel-fras up Llwytmor
- Abergwyngregyn via Llyn Anafon up Llwytmor
Other routes up Garnedd Uchaf
| Route | Distance | Ascent | Time up | Grade |
|---|---|---|---|---|
| Cwm Eigiau via the eastern Foel Grach ridge | 8.1 km one way | 680 m | 2h 45m | Hard |
| Rachub via Drosgl and Yr Aryg flanks, via Bera Bach | 6.9 km one way | 620 m | 2h 25m | Hard |
| Bwlch y Ddeufaen via Drum and northern ridge | 8.3 km one way | 630 m | 2h 45m | Hard |
| Llanfairfechan via Drum and northern ridge | 8.8 km one way | 790 m | 3h 5m | Hard |
| Abergwyngregyn via Drum via Drum and northern ridge | 8.5 km one way | 750 m | 2h 55m | Hard |
In an emergency
Call 999, ask for the police and then mountain rescue. Give your location (the start is at SH 680 720, the summit at SH 686 669), what happened and how many are in your group. If you have no signal for a call, a text to 999 works once you have registered your phone with emergencySMS: text "register" to 999 before you go.
Abergwyngregyn via Llyn Anafon: questions and answers
How far is Abergwyngregyn via Llyn Anafon?
Abergwyngregyn via Llyn Anafon is 8.0 km one way to the summit of Garnedd Uchaf, with 770 m of ascent. There and back by the same way is about 16.0 km.
How long does Abergwyngregyn via Llyn Anafon take?
About 2h 55m to the summit of Garnedd Uchaf and 4h 30m there and back by Naismith's rule (5 km/h plus 10 minutes per 100 m of ascent), before stops. A relaxed group takes nearer 5h 30m for the round trip.
How steep is Abergwyngregyn via Llyn Anafon?
The steepest 500 m averages about 25%, starting 0.6 km from the start, and 19% of the way is steeper than 1 in 5. Abergwyngregyn via Llyn Anafon climbs 757 m in all on the track.
Where do you park for Abergwyngregyn via Llyn Anafon?
Abergwyngregyn via Llyn Anafon starts from Abergwyngregyn mountain-road track junction (postcode LL33 0LP). The grid reference is SH 680 720. Aber Falls upper car park; the postcode is approximate
Is Abergwyngregyn via Llyn Anafon suitable for beginners?
Not as a first mountain. Peakify grades it Hard: steep, rough ground where a slip matters. Build up on an easier route first.
What time should I start Abergwyngregyn via Llyn Anafon today?
By 12:41 at the latest. Sunset on Garnedd Uchaf today is 18:11, Abergwyngregyn via Llyn Anafon takes about 4h 30m there and back, and that leaves an hour for stops. Start earlier in winter or if the forecast turns.
Is there a GPX for Abergwyngregyn via Llyn Anafon?
Yes. Download it from this page. It is an ascent-only planning track from the start to the summit, plotted on OpenStreetMap paths and not checked on the ground.