Eryri by UTMB®Llanberis, United Kingdom🇬🇧

The published GPX measures 161 km with 9516 m of climbing, 59 m per km. The course sits between 28 m and 1066 m of altitude. 52% of the gain sits in the first half.

• 0-7.1 km · Start → Bwlch Glas (Finger Stone): 885 m up / 28 m down; the stretch climbs.
• 7.1-12 km · Bwlch Glas (Finger Stone) → Pen-y-Pass: 83 m up / 661 m down; the stretch descends.
• 12-15 km · Pen-y-Pass → Glyder Fawr: 623 m up / 41 m down; the stretch climbs.
• 15-22 km · Glyder Fawr → Ogwen Valley: 124 m up / 761 m down; the stretch descends.
• 22-29 km · Ogwen Valley → Carnedd Llewelyn: 897 m up / 249 m down; the stretch climbs.
• 29-37 km · Carnedd Llewelyn → Llyn Eigiau: 142 m up / 661 m down; the stretch descends.
• 37-50 km · Llyn Eigiau → Capel Curig: 459 m up / 641 m down; the stretch descends.
• 50-53 km · Capel Curig → Moel Siabod: 589 m up / 293 m down; the stretch climbs.
• 53-60 km · Moel Siabod → Dolwyddelan: 133 m up / 445 m down; the stretch descends.
• 60-64 km · Dolwyddelan → Y Ro Wen: 329 m up / 61 m down; the stretch climbs.
• 64-72 km · Y Ro Wen → Blaenau Ffestiniog: 83 m up / 399 m down; the stretch descends.
• 72-81 km · Blaenau Ffestiniog → Moelwyn Mawr: 590 m up / 390 m down; the stretch climbs.
• 81-85 km · Moelwyn Mawr → Croesor: 122 m up / 255 m down; the stretch descends.
• 85-88 km · Croesor → Cnicht: 386 m up / 60 m down; the stretch climbs.
• 88-98 km · Cnicht → Gwastadanas Farm: 155 m up / 676 m down; the stretch descends.
• 98-112 km · Gwastadanas Farm → Beddgelert: 527 m up / 429 m down; the stretch keeps rolling.
• 112-116 km · Beddgelert → Moel Hebog: 664 m up / 274 m down; the stretch climbs.
• 116-123 km · Moel Hebog → Mynydd Drws-y-Coed: 474 m up / 828 m down; the stretch descends.
• 123-127 km · Mynydd Drws-y-Coed → Rhyd-Ddu: 164 m up / 41 m down; the stretch climbs.
• 127-133 km · Rhyd-Ddu → Yr Wyddfa/Snowdon: 743 m up / 429 m down; the stretch climbs.
• 133-139 km · Yr Wyddfa/Snowdon → Bron-y-Fedw Uchaf: 227 m up / 510 m down; the stretch descends.
• 139-143 km · Bron-y-Fedw Uchaf → Mynydd Mawr: 333 m up / 419 m down; the stretch keeps rolling.
• 143-148 km · Mynydd Mawr → Betws Garmon: 212 m up / 165 m down; the stretch keeps rolling.
• 148-154 km · Betws Garmon → Moel Eilio: 522 m up / 339 m down; the stretch climbs.
• 154-161 km · Moel Eilio → Finish: 51 m up / 461 m down; the stretch descends.

The race climbs from the gun: 516 m over the first 5 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The backbone of the course runs from km 1 to km 7: 878 m over 6.4 km at 14% average, its steepest roughly 250 m section averaging 31% on the GPX trace. Kilometre by kilometre: km 2 143 m, km 3 84 m, km 4 112 m, km 5 117 m, km 6 225 m, km 7 144 m. Running is off the table only in the steepest roughly 250 m core; hike that part with short steps and run again once the grade eases.

The late climb from km 125 to km 131: 859 m over 5.9 km at 14% average, its steepest roughly 250 m section averaging 28%. Kilometre by kilometre: km 126 87 m, km 127 100 m, km 128 171 m, km 129 196 m, km 130 167 m, km 131 160 m. By the time you start it, about 76% of the day's climbing is behind you. The hard core of this climb is hiking ground; keep the rest at a steady effort and do not fight the wall when it arrives.

The longest descent starts at km 29 and loses 881 m by km 47 at 5% average, its steepest roughly 250 m section averaging 21%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 53 averages 40% on the GPX trace over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 6 km drop 333 m first and then climb 51 m. Empty your legs on the descent and that final rise takes the payment.

You reach the climb after Pen-y-Pass with about 661 m of descent already in your quads; treat its first half as recovery effort.

You reach the climb after Ogwen Valley with about 761 m of descent already in your quads; treat its first half as recovery effort.

You reach the climb after Capel Curig with about 641 m of descent already in your quads; treat its first half as recovery effort.

The leg from Gwastadanas Farm to Beddgelert is long and unsupported: 14 km and 527 m of climbing with no aid in between, so leave Gwastadanas Farm with full capacity.

You reach the climb after Beddgelert with about 429 m of descent already in your quads; treat its first half as recovery effort.

A steep pitch starts within about 1.6 km of Mynydd Drws-y-Coed; keep the stop short and do not enter it on cooled-down legs.

The published GPX measures 106 km with 5624 m of climbing, 53 m per km. The course sits between 28 m and 992 m of altitude. 52% of the gain sits in the first half.

• 0-7.1 km · Start → Bwlch Glas (Finger Stone): 885 m up / 28 m down; the stretch climbs.
• 7.1-14 km · Bwlch Glas (Finger Stone) → Gwastadannas Farm: 73 m up / 928 m down; the stretch descends.
• 14-23 km · Gwastadannas Farm → Moel Siabod: 804 m up / 179 m down; the stretch climbs.
• 23-29 km · Moel Siabod → Dolwyddelan: 55 m up / 605 m down; the stretch descends.
• 29-42 km · Dolwyddelan → Blaenau Ffestiniog: 493 m up / 452 m down; the stretch keeps rolling.
• 42-51 km · Blaenau Ffestiniog → Moelwyn Mawr: 590 m up / 222 m down; the stretch climbs.
• 51-54 km · Moelwyn Mawr → Croesor: 70 m up / 434 m down; the stretch descends.
• 54-57 km · Croesor → Cnicht: 436 m up / 26 m down; the stretch climbs.
• 57-67 km · Cnicht → Gwastadanas Farm: 143 m up / 703 m down; the stretch descends.
• 67-82 km · Gwastadanas Farm → Bedgelert: 459 m up / 438 m down; the stretch keeps rolling.
• 82-96 km · Bedgelert → Rhyd Ddu: 1273 m up / 1149 m down; the stretch keeps rolling.
• 96-106 km · Rhyd Ddu → Finish: 344 m up / 458 m down; the stretch descends.

The race climbs from the gun: 516 m over the first 5 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The backbone of the course runs from km 1 to km 7: 878 m over 6.4 km at 14% average, its steepest roughly 250 m section averaging 31% on the GPX trace. Kilometre by kilometre: km 2 143 m, km 3 84 m, km 4 112 m, km 5 117 m, km 6 225 m, km 7 144 m. Running is off the table only in the steepest roughly 250 m core; hike that part with short steps and run again once the grade eases.

The climb between km 15 and km 22: 753 m over 7.5 km at 10% average, its steepest roughly 250 m section averaging 18%. Heaviest kilometres: km 22 135 m, km 19 127 m, km 21 111 m, km 20 94 m. This is hiking terrain, not running terrain. Walk it with intent and keep your heart rate off the ceiling.

The longest drag runs from km 41 to km 50: net 505 m over 8.9 km at 6% average, its steepest roughly 250 m section averaging 21%, 601 m of climbing in total with 96 m given back. Heaviest kilometres: km 50 156 m, km 47 138 m, km 46 70 m, km 44 55 m. By the time you start it, about 41% of the day's climbing is behind you. Trying to run this costs far more than it saves. Shorten the stride, lean on the poles, keep moving.

The steepest wall stands between km 80 and km 86: net 581 m over 5.2 km at 11% average, its steepest roughly 250 m section averaging 36% on the GPX trace, 796 m of climbing in total with 215 m given back. Kilometre by kilometre: km 81 25 m, km 82 62 m, km 83 272 m, km 84 326 m, km 85 40 m, km 86 86 m. By the time you start it, about 70% of the day's climbing is behind you. The hard core of this climb is hiking ground; keep the rest at a steady effort and do not fight the wall when it arrives.

The longest descent starts at km 60 and loses 585 m by km 73 at 4% average, its steepest roughly 250 m section averaging 27%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 22 averages 40% on the GPX trace over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 6 km drop 331 m first and then climb 51 m. Empty your legs on the descent and that final rise takes the payment.

You reach the climb after Gwastadannas Farm with about 928 m of descent already in your quads; treat its first half as recovery effort.

A steep pitch starts within about 0.7 km of Gwastadannas Farm; keep the stop short and do not enter it on cooled-down legs.

You reach the climb after Blaenau Ffestiniog with about 452 m of descent already in your quads; treat its first half as recovery effort.

You reach the climb after Croesor with about 434 m of descent already in your quads; treat its first half as recovery effort.

The leg from Bedgelert to Rhyd Ddu is long and unsupported: 14 km and 1273 m of climbing with no aid in between, so leave Bedgelert with full capacity.

The published GPX measures 78 km with 2607 m of climbing, 33 m per km. The course sits between 6 m and 992 m of altitude. 57% of the gain sits in the first half.

• 0-17 km · Start → Y Fron: 335 m up / 58 m down; the stretch climbs.
• 17-31 km · Y Fron → Llanberis Path: 376 m up / 435 m down; the stretch keeps rolling.
• 31-37 km · Llanberis Path → Bwlch Glas (Finger Stone): 766 m up / 51 m down; the stretch climbs.
• 37-45 km · Bwlch Glas (Finger Stone) → Gwastadannas: 91 m up / 949 m down; the stretch descends.
• 45-59 km · Gwastadannas → Beddgelert: 432 m up / 450 m down; the stretch keeps rolling.
• 59-68 km · Beddgelert → Rhyd Ddu: 221 m up / 103 m down; gently rolling.
• 68-78 km · Rhyd Ddu → Finish: 386 m up / 460 m down; the stretch keeps rolling.

The race climbs from the gun: 46 m over the first 5 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The backbone of the course runs from km 31 to km 37: 789 m over 5.8 km at 14% average, its steepest roughly 250 m section averaging 27%. Kilometre by kilometre: km 32 128 m, km 33 84 m, km 34 106 m, km 35 121 m, km 36 233 m, km 37 122 m. Running is off the table only in the steepest roughly 250 m core; hike that part with short steps and run again once the grade eases.

The steepest wall stands between km 49 and km 54: net 224 m over 4.4 km at 5% average, its steepest roughly 250 m section averaging 32% on the GPX trace, 265 m of climbing in total with 41 m given back. Kilometre by kilometre: km 52 19 m, km 53 142 m, km 54 79 m. This is hiking terrain, not running terrain. Walk it with intent and keep your heart rate off the ceiling.

The late climb from km 68 to km 71: net 285 m over 3.6 km at 8% average, its steepest roughly 250 m section averaging 16%, 332 m of climbing in total with 47 m given back. Kilometre by kilometre: km 69 70 m, km 70 103 m, km 71 104 m. By the time you start it, about 85% of the day's climbing is behind you. At this point in the day most runners walk this gradient. Settle into a hiking rhythm and let the metres come.

The longest descent starts at km 37 and loses 930 m by km 50 at 7% average, its steepest roughly 250 m section averaging 31% on the GPX trace. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 19 averages 23% over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 6 km drop 331 m first and then climb 51 m. Empty your legs on the descent and that final rise takes the payment.

You reach the climb after Llanberis Path with about 435 m of descent already in your quads; treat its first half as recovery effort.

The leg from Gwastadannas to Beddgelert is long and unsupported: 14 km and 432 m of climbing with no aid in between, so leave Gwastadannas with full capacity.

The published GPX measures 57 km with 3490 m of climbing, 62 m per km. The course sits between 61 m and 1066 m of altitude. 61% of the gain sits in the first half.

• 0-7.1 km · Start → Bwlch Glas (Finger Stone): 885 m up / 28 m down; the stretch climbs.
• 7.1-15 km · Bwlch Glas (Finger Stone) → Gwastadanas Farm: 91 m up / 978 m down; the stretch descends.
• 15-27 km · Gwastadanas Farm → Yr Wyddfa: 1164 m up / 254 m down; the stretch climbs.
• 27-33 km · Yr Wyddfa → Bron y Fedw Uchaf: 11 m up / 845 m down; the stretch descends.
• 33-37 km · Bron y Fedw Uchaf → Mynydd Mawr: 547 m up / 159 m down; the stretch climbs.
• 37-41 km · Mynydd Mawr → Betws Garmon: 10 m up / 419 m down; the stretch descends.
• 41-48 km · Betws Garmon → Moel Eilio: 629 m up / 148 m down; the stretch climbs.
• 48-57 km · Moel Eilio → Finish: 153 m up / 658 m down; the stretch descends.

The race climbs from the gun: 456 m over the first 4.5 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The climb between km 1 and km 7: 878 m over 6.4 km at 14% average, its steepest roughly 250 m section averaging 31% on the GPX trace. Kilometre by kilometre: km 2 143 m, km 3 84 m, km 4 112 m, km 5 117 m, km 6 225 m, km 7 144 m. Running is off the table only in the steepest roughly 250 m core; hike that part with short steps and run again once the grade eases.

The backbone of the course runs from km 19 to km 26: 978 m over 6.8 km at 14% average, its steepest roughly 250 m section averaging 37% on the GPX trace. Heaviest kilometres: km 24 255 m, km 25 235 m, km 26 202 m, km 22 143 m. The hard core of this climb is hiking ground; keep the rest at a steady effort and do not fight the wall when it arrives.

The steepest wall stands between km 33 and km 36: 537 m over 3.4 km at 16% average, its steepest roughly 250 m section averaging 39% on the GPX trace. Kilometre by kilometre: km 34 111 m, km 35 229 m, km 36 133 m. Running is not on the menu at this grade; settle into a hike from the bottom and load the poles, short steps.

The late climb from km 41 to km 47: 583 m over 5.8 km at 10% average, its steepest roughly 250 m section averaging 29%. Kilometre by kilometre: km 42 81 m, km 43 130 m, km 44 34 m, km 45 35 m, km 46 118 m, km 47 195 m. By the time you start it, about 78% of the day's climbing is behind you. Outside the steep core the grade is workable; when the wall comes, switch to a hike without hesitating and rebuild the rhythm over the top.

The longest descent starts at km 7 and loses 920 m by km 18 at 8% average, its steepest roughly 250 m section averaging 29%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 26 averages 30% over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 6 km drop 333 m first and then climb 51 m. Empty your legs on the descent and that final rise takes the payment.

You reach the climb after Gwastadanas Farm with about 978 m of descent already in your quads; treat its first half as recovery effort.

The leg from Gwastadanas Farm to Yr Wyddfa is long and unsupported: 11 km and 1164 m of climbing with no aid in between, so leave Gwastadanas Farm with full capacity.

You reach the climb after Bron y Fedw Uchaf with about 845 m of descent already in your quads; treat its first half as recovery effort.

You reach the climb after Betws Garmon with about 419 m of descent already in your quads; treat its first half as recovery effort.

A steep pitch starts within about 0.3 km of Betws Garmon; keep the stop short and do not enter it on cooled-down legs.

A steep pitch starts within about 1.1 km of Moel Eilio; keep the stop short and do not enter it on cooled-down legs.

The published GPX measures 22 km with 1145 m of climbing, 53 m per km. The course sits between 105 m and 724 m of altitude. 68% of the gain sits in the first half.

The race climbs from the gun: 61 m over the first 1.7 km. Do not chase the crowd, the two minutes you win here get taken back with interest.

The backbone of the course runs from km 1 to km 8: 595 m over 6.9 km at 9% average, its steepest roughly 250 m section averaging 29%. Heaviest kilometres: km 8 184 m, km 7 101 m, km 2 92 m, km 6 77 m. This is hiking terrain, not running terrain. Walk it with intent and keep your heart rate off the ceiling.

The climb between km 13 and km 15: 312 m over 1.8 km at 17% average, its steepest roughly 250 m section averaging 29%. Kilometre by kilometre: km 14 144 m, km 15 167 m. Running is not on the menu at this grade; settle into a hike from the bottom and load the poles, short steps.

The longest descent starts at km 15 and loses 350 m by km 20 at 7% average, its steepest roughly 250 m section averaging 17%. Its length can load the quads, so begin under control and build rhythm only when the ground and visibility allow it. The drop at km 8 averages 28% over its steepest roughly 250 m section; shorten the stride, stay balanced and set speed to the ground instead of braking continuously.

The last 2.6 km drop 151 m. If anything is left in your legs, spend it here.