Snowdonia Marathon route map
raceindex.org has a GPS course file for Snowdonia Marathon, so runners can inspect the route line on the map. Elevation charts and ascent figures appear only when that file includes usable elevation data.
Snowdonia Marathon
This race edition
- Race date
- Date not confirmed for this distance
- Race timezone
- Timezone not confirmed
- Edition status
- Status not confirmed
Entry options
2026 edition
Entry options are not yet confirmed for this edition. Check the organiser before making plans.
Modelled energy-cost change 3.3% versus flat · net elevation -15 m
Decision summary
Snowdonia Marathon at a glance
- Route ascent
- 786 m
- Typical conditions
- 69/100
- Evidence depth
- 30 verified facts
Lower than 25% of comparable mapped races
Historical race-date favourability, not a forecast
Stored GPS route
Quick answers
What runners ask first
How hilly is the Snowdonia Marathon?
The Snowdonia Marathon route has 786 m of ascent, 801 m of descent and an estimated 3.3% grade-adjusted pace penalty versus a flat route.
Where does the Snowdonia Marathon route go?
The Snowdonia Marathon route starts at Llanberis (postcode LL55 4TA) and finishes at Llanberis. Underfoot, expect a road course. It passes Nant Peris, Pen-y-Gwryd, Llyn Dinas, Beddgelert and Rhyd-ddu.
Race character
Scenery
- Mountain
- Parkland
- Lakeside
- Countryside
Atmosphere
- Scenic Tour
- Competitive
- Destination
Terrain
- Road
- Mixed
- Elevation character
- Mountainous
- Technicality
- Moderate
Entry, logistics and records
Records and field
- Men's course record
- 2:28:41 (Andrew Davies)
- Women's course record
- 2:56:43 (June Cowper)
- Field size
- Over 2000 runners registered for the 2010 race
Entry requirements
- Entry status
- Ballot entry: Entry is listed as ballot or lottery based.
- Ballot
- Yes
Access and course status
- Start
- Llanberis (postcode LL55 4TA)
- Finish
- Llanberis
Course facts
- Course type
- Loop
- Landmarks
- Nant Peris, Pen-y-Gwryd, Llyn Dinas, Beddgelert, Rhyd-ddu, Waunfawr
- Notable features
- Circumnavigates the Snowdon massif (Yr Wyddfa)
- 788m elevation gain
- described as the UK's toughest marathon
How hilly is the Snowdonia Marathon?
- Steep descent 11%
- Descent 17%
- Flat 41%
- Climb 20%
- Steep climb 11%
- Total ascent
- 786 m
- Net elevation
- −15 m
- GAP factor
- 3.3%
- Longest climb
- 3,560 m at 6.8%
What are typical race-day conditions?
- 10°CTypical temperature
- 24 kphTypical wind
- 6 mmTypical rainfall
- 69Favourability /100
More race details
Is the Snowdonia Marathon flat?
Its normalised GAP factor is 3.3% slower than a flat course, with about 786 m of total ascent.