Llyn Celyn via Carnedd y Filiast up Waun Garnedd-y-Filiast: route map, distance and time
651 m · Barmouth to Betws-y-Coed and Bala
A hard mountain walk to the summit from Llyn Celyn north-shore public track, over other tops on the way.
Llyn Celyn via Carnedd y Filiast starts at about 325 m and gains 432 m over 6.3 km to 645 m on the track. The first 4 km are the easy part, averaging 4%. The steepest kilometre is the one ending at 5 km, which climbs 143 m at an average of 14%. The final 0.3 km eases to the top.
Llyn Celyn via Carnedd y Filiast at a glance
| Distance | 6.3 km one way, to the top |
|---|---|
| Ascent | 450 m |
| Climb on the track | 432 m up, 115 m down on the way |
| Start and top of the track | 325 m to 660 m (summit 651 m) |
| Steepest 500 m | About 17%, from 4.6 km |
| Steeper than 1 in 5 | 3% of the way |
| Time up | 2h 0m by Naismith's rule |
| There and back | 3h 15m, down the same way |
| Grade | Hard |
| Start | Llyn Celyn north-shore public track |
| Start grid reference | SH 861 410 |
| Summit grid reference | SH 874 452 |
| Parking | No checked car park for this start; find lawful parking nearby |
Llyn Celyn via Carnedd y Filiast 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 Llyn Celyn via Carnedd y Filiast 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.
Llyn Celyn via Carnedd y Filiast 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 | 433 m | +108 m | 11% | SH 857 416 |
| 2 km | 494 m | +61 m | 6% | SH 862 424 |
| 3 km | 529 m | +35 m | 4% | SH 869 426 |
| 4 km | 473 m | -57 m | -6% | SH 875 432 |
| 5 km | 616 m | +143 m | 14% | SH 872 440 |
| 6 km | 639 m | +23 m | 2% | SH 872 449 |
| 6.3 km | 645 m | +6 m | 2% | SH 874 452 |
How long Llyn Celyn via Carnedd y Filiast takes
| Pace | To the top | There and back |
|---|---|---|
| Brisk 6 km/h, 8 min per 100 m up | 1h 40m | 2h 40m |
| Steady (Naismith) 5 km/h, 10 min per 100 m up | 2h 0m | 3h 15m |
| Relaxed 4 km/h, 12 min per 100 m up | 2h 30m | 4h 5m |
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 07:05, sunset 16:51. Start by 12:36 to be down before dark, allowing 3h 15m for the walk and an hour for stops.
- Tomorrow: sunrise 07:06, sunset 16:49. Start by 12:34 to be down before dark, allowing 3h 15m for the walk and an hour for stops.
Waun Garnedd-y-Filiast summit weather for this route
There is no recent summit forecast cached for Waun Garnedd-y-Filiast right now. The main Waun Garnedd-y-Filiast page loads the live forecast when you open it. Open the live Waun Garnedd-y-Filiast forecast.
Before you go, also check: MWIS Snowdonia forecast · Met Office mountain forecast.
About Waun Garnedd-y-Filiast
More about Waun Garnedd-y-Filiast, with the live forecast.
Challenges that include Waun Garnedd-y-Filiast
More walks from Llyn Celyn north-shore public track
Routes in Peakify's guides that start within 500 m of this one, for another day from the same car park.
- Llyn Celyn northern uplands up Carnedd y Filiast
- Llyn Celyn northern uplands up Carnedd Llechwedd-llyfn
In an emergency
Call 999, ask for the police and then mountain rescue. Give your location (the start is at SH 861 410, the summit at SH 874 452), 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.
Llyn Celyn via Carnedd y Filiast: questions and answers
How far is Llyn Celyn via Carnedd y Filiast?
Llyn Celyn via Carnedd y Filiast is 6.3 km one way to the summit of Waun Garnedd-y-Filiast, with 450 m of ascent. There and back by the same way is about 12.6 km.
How long does Llyn Celyn via Carnedd y Filiast take?
About 2h 0m to the summit of Waun Garnedd-y-Filiast and 3h 15m 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 4h 5m for the round trip.
How steep is Llyn Celyn via Carnedd y Filiast?
The steepest 500 m averages about 17%, starting 4.6 km from the start, and 3% of the way is steeper than 1 in 5. Llyn Celyn via Carnedd y Filiast climbs 432 m in all on the track.
Where do you park for Llyn Celyn via Carnedd y Filiast?
Llyn Celyn via Carnedd y Filiast starts from Llyn Celyn north-shore public track. The grid reference is SH 861 410. No checked car park for this start; find lawful parking nearby
Is Llyn Celyn via Carnedd y Filiast 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 Llyn Celyn via Carnedd y Filiast today?
By 12:36 at the latest. Sunset on Waun Garnedd-y-Filiast today is 16:51, Llyn Celyn via Carnedd y Filiast takes about 3h 15m there and back, and that leaves an hour for stops. Start earlier in winter or if the forecast turns.
Is there a GPX for Llyn Celyn via Carnedd y Filiast?
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.