Jurassic Extinction / Jurassic Coast 100.
For its ten-year anniversary the headline race of the Jurassic Extinction / Jurassic Coast 100 is the full line: 105 miles from South Haven Point near Poole to Exmouth, following the South West Coast Path throughout. Around 4,700 metres of climbing add up without a single mountain, purely from dropping to sea level and regaining the cliffs, and your preparation has to include a whole night on your feet.
Jurassic Extinction / Jurassic Coast 100 2027: Course, Elevation & Route Profile
The route is a pure point-to-point line with no loop: it starts at South Haven Point, ends in Exmouth, and largely guides itself, since you follow the Coast Path markers and, where the path has moved, the temporary diversion signs. The terrain is exposed coastline with cliff edges that demand care, and livestock along the way.
The first sharp block sits between kilometres 36 and 51, where climbs of 120 to 160 metres come one after another. Beyond Weymouth comes its counterpart: until around kilometre 100 the path stays close to sea level for long stretches, with only a few hills.
Then the second half of the coast opens with longer climbs, including 183 metres in one go at kilometre 106. The course keeps its hardest section for the end: between kilometres 136 and 149 ramps of roughly 15 to 18 percent stand in the way, before the path drops towards Exmouth over one last hill.
| Start | Length | Ø | Max. | Gain | Cat. |
|---|---|---|---|---|---|
| km 35.9 | 1.6 km | 7.9 % | 20.1 % | +124 m | Cat. 4 |
| km 39.4 | 1 km | 15.5 % | 45.5 % | +159 m | Cat. 4 |
| km 41.6 | 1.5 km | 10.9 % | 40.4 % | +157 m | Cat. 4 |
| km 49.5 | 1.3 km | 10.9 % | 28.9 % | +145 m | Cat. 4 |
| km 106.1 | 1.7 km | 10.9 % | 25.2 % | +183 m | Cat. 3 |
| km 112.8 | 2.3 km | 7.2 % | 17.2 % | +167 m | Cat. 3 |
| km 141.7 | 0.7 km | 18 % | 29.1 % | +131 m | Cat. 4 |
| km 147.4 | 1.4 km | 10.6 % | 24.6 % | +152 m | Cat. 4 |
Climb categories follow the road-cycling convention and rate the terrain itself (length and gradient) regardless of sport: Cat. 4 marks the easiest rated climbs, Cat. 1 the hardest, and HC (hors catégorie, “beyond categorization”) is reserved for the most brutal ascents. Short climbs below the Cat. 4 threshold stay unrated.
How to pace Jurassic Extinction / Jurassic Coast 100.
Start under control
The 38-hour limit runs through a complete night and into the second evening, so the question is distribution far more than speed. Steep climbing and steep descending together make up almost a quarter of the course. Treat those sections on the first morning the way you will still need to handle them on day two: walk the climbs, ration the descents.
Hold your rhythm
The Extinction is decided between kilometres 136 and 149. The steepest ramps of the race meet legs that have already covered more than 130 kilometres, and if you can only stop and stand here, you lose hours rather than minutes.
Spend what is left
The trap is the quiet middle. After the block before Weymouth the flat kilometres feel like gifts, and that evening the rested 100 km field joins the same path at Nothe Fort. Get pulled along by their pace and you pay for it exactly where the ramps begin.
Training plan for Jurassic Extinction / Jurassic Coast 100: 12-week build
Build the base
Age-group runners should expect around 28 to 37 hours. That is a continuous aerobic effort in which walking the climbs is the plan, not a defeat. Hard spikes come only on the short steep ramps, but their sheer number turns the coast into a strength question: across the full length you collect almost 30 metres of climbing per kilometre without ever getting high.
Train race pace
The core of your preparation is long weekends with two runs back to back, the second one hilly and on tired legs. That rehearses what the last 30 kilometres ask for: hiking a steep climb evenly and breaking back into a run straight afterwards. Add hill repeats on very steep slopes and deliberately practised descents, because the downhill kilometres wear out your quads long before the finish is within reach.
Rehearse the course
Schedule at least one session through the night so you learn how eating, pace and concentration behave without sleep. Over this duration your fuelling also has to be tested, specifically in the late hours of a session when your stomach gets choosier.
Arrive fresh
Conditions in early June are those of an exposed coast: train somewhere you have to read waymarks, and build the habit of staying alert to cliff edges, livestock and diversions even when exhausted. That attention is what fades first once the second day is under way.
Courses
Download the Jurassic Extinction / Jurassic Coast 100 course as a GPX file for your watch or bike computer.
Let YOUB adapt your plan for Jurassic Extinction / Jurassic Coast 100 dynamically
Ben connects your goal, the course, current load, recovery, and calendar. Your plan stays pointed at race day even when real life is not perfectly plannable.
Everything about Jurassic Extinction / Jurassic Coast 100.
How long is Jurassic Extinction / Jurassic Coast 100?
Jurassic Extinction / Jurassic Coast 100 is 169 km long. That distance shapes how much aerobic endurance, pace durability, and race-specific work belong in the training plan.
How much elevation gain does Jurassic Extinction / Jurassic Coast 100 have?
Jurassic Extinction / Jurassic Coast 100 has around 4,702 m of elevation gain over 169 km. That affects pacing, muscular load, and preparation for late-race sections.
What is the route profile of Jurassic Extinction / Jurassic Coast 100?
Jurassic Extinction / Jurassic Coast 100 is classified as Hilly, averaging 28.3 vertical metres per kilometre. 24% of the route is flat, 27% climbs moderately (2 to 6%) and 12% is steeper than 6%.
What climbs does Jurassic Extinction / Jurassic Coast 100 have?
The hardest climb of Jurassic Extinction / Jurassic Coast 100 starts at kilometre 106.1, runs for 1.7 km at an average of 10.9% and gains 183 metres. Cycling-convention rating: Cat. 3. 8 climbs are mapped in total.
Is Jurassic Extinction / Jurassic Coast 100 a loop course?
No, Jurassic Extinction / Jurassic Coast 100 is a point-to-point course: start and finish are in different places.
Is there a GPX file for the Jurassic Extinction / Jurassic Coast 100 course?
Yes. The Jurassic Extinction / Jurassic Coast 100 course is on this page as a free GPX download — ready to import into Garmin, Wahoo, Komoot, Strava or any other app that reads GPX.
How should I prepare for Jurassic Extinction / Jurassic Coast 100?
Preparation for Jurassic Extinction / Jurassic Coast 100 should account for 169 km, 4,702 m of elevation gain, current training load, and available training time. An adaptive plan helps place key sessions without ignoring recovery and real life.
What pacing strategy works for Jurassic Extinction / Jurassic Coast 100?
The pacing strategy for Jurassic Extinction / Jurassic Coast 100 should reflect 169 km, 4,702 m of elevation gain, and your current fitness. Start controlled and keep margin for sections where the profile or fatigue makes target pace harder.
When does Jurassic Extinction / Jurassic Coast 100 take place?
Jurassic Extinction / Jurassic Coast 100 takes place on June 5, 2027.
Where does Jurassic Extinction / Jurassic Coast 100 take place?
Jurassic Extinction / Jurassic Coast 100 takes place in Exmouth, United Kingdom.
Which distances does Jurassic Extinction / Jurassic Coast 100 offer?
Jurassic Extinction / Jurassic Coast 100 offers 5 distances — Jurassic Extinction 105 Mile: 169 km; Jurassic Coast 70 km: 70 km; Jurassic Coast 100 km: 100 km; Jurassic Coast 50 km: 50 km; Jurassic Coast 33 km: 33 km.
How do I register for Jurassic Extinction / Jurassic Coast 100?
Registration runs through the organiser: ultratrailevents.com. YOUB shows you the course, elevation profile and training plan for your preparation.
