ROYAUME-UNI · England
Thames Path 100: London to Oxford's Flattest 100-Mile Ultra, Measured
Informations clés
Distance
161 km
Date
Droit d’inscription
220 GBP
€ / km
€1.57
Nouvelle date en attente
Cette course a déjà eu lieu. La date de la prochaine édition est en attente.
Flat-but-mental: nonstop riverside miles, fast pacing, and a pure endurance test.
The Thames Path 100 is a 100-mile point-to-point trail race from Richmond in South West London to the centre of Oxford, following the River Thames along one of England's most iconic long-distance walking routes. With just 1,900 feet of elevation gain across 161 kilometres — ranking 5th-lowest for gain per kilometre among nearly 390 measured trail races in the DiscoverTrailRaces database, and 4th-flattest overall — the TP100 is one of the flattest 100-mile ultras in Europe. The course follows groomed riverside gravel, paved tow-path, and meadow trail through Hampton Court, Windsor, Henley-on-Thames, and Goring to Oxford's university skyline. The deceptive challenge is duration, not gradient: 30 hours and 161 kilometres of relentless flat terrain, passing royal palaces and English riverside villages. Organised by Centurion Running since 2012 — now in its 15th edition — the TP100 is a Western States Endurance Run qualifier with a 300-place ballot cap. A 50-mile qualifying race completed within 15 hours is required. The 2026 date was 2 May; 2027 dates to be confirmed.
Élévation et Terrain
Mètres totaux
1,900m
D+/KM
11.8m/km
Pour référence, le Tor des Géants 330 km a 73 D+/km.
Pente montante moyenne
4%
Pente descendante moyenne
-3.9%
Distribution du gradient de montée
| 2–5% | 7 km | |
|---|---|---|
| 5–10% | 1.1 km | |
| 10–15% | 0.2 km | |
| 15–20% | 0.2 km | |
| 20%+ | 0 km |
Profil de parcours
AnalysedDétail du terrain
| 5.2% | Montée |
|---|---|
| 89.5% | Plat |
| 5.3% | Descente |
Terrain
Ascensions
Principales montées
| Rank | Length | Elevation gain | Start km | Average gradient | Max gradient |
|---|---|---|---|---|---|
| 1 | 0.9 km · 53 m gain starts km 85 · avg 6.2% · max 27.6% | ||||
| 2 | 1.4 km · 31 m gain starts km 110 · avg 2.2% · max 8.2% | ||||
| 3 | 0.9 km · 25 m gain starts km 104 · avg 2.8% · max 16.8% |
Principales descentes
| Rank | Length | Elevation drop | Start km | Average gradient | Max gradient |
|---|---|---|---|---|---|
| 1 | 1.8 km · 48 m drop starts km 86 · avg -2.7% · max -10.5% | ||||
| 2 | 1.3 km · 33 m drop starts km 112 · avg -2.5% · max -15.6% | ||||
| 3 | 0.5 km · 31 m drop starts km 105 · avg -6% · max -9.4% |
Thames Path 100: London to Oxford's Flattest 100-Mile Ultra, Measured
What Is the Thames Path 100? 161km, ~579m D+, Point-to-Point from Richmond to Oxford▼
What is the Thames Path 100?
The Thames Path 100 (TP100) is a 100-mile (161km) continuous trail race from Richmond in South West London to Oxford, following the Thames Path National Trail. Organised by Centurion Running since 2012, it is now in its 15th edition. The course gains approximately 1,900 feet (around 579m) of elevation — extremely low for a race of this length — with 75 percent trail or gravel and 25 percent paved tow-path. The race starts at Richmond New Waterfront at 09:00 and finishes at Queen's College Sports Ground, Oxford, with a 30-hour cut-off. The TP100 is one of the flattest 100-mile ultras in Europe and ranks 4th flattest overall in the DiscoverTrailRaces database of nearly 390 measured trail races.
How Flat Is the TP100? Ranked 4th Flattest Out of ~390 Trail Races in the DTR Database▼
How flat is the TP100 course and why is that significant?
The Thames Path 100 is exceptionally flat by every measured metric. It ranks 4th flattest out of approximately 390 trail races in the DiscoverTrailRaces database by proportion of flat terrain, and 5th-lowest for elevation gain per kilometre at roughly 11.8 m/km. The average uphill gradient across all climbing sections is around 3.95 percent — the 8th gentlest in the database — and the average descent gradient ranks 7th gentlest of all measured courses (inverted scale where rank 1 equals most gentle). This makes the TP100 significant in two ways: it is genuinely accessible for runners who struggle with technical mountain terrain, and it creates a unique mental challenge — 161 kilometres of flat, featureless riverside running tests pacing discipline and mental resilience far more than gradient management.
How Much Does the Thames Path 100 Cost and How Hard Is It to Enter? £220, Waitlisted, 50-Mile Qual Required▼
How much does it cost to enter the Thames Path 100 and how hard is it to get in?
Entry costs £220 for affiliated runners (£222 unaffiliated). The 2026 edition was sold out and running on a waitlist, with 300 places available. Entries typically open by ballot and fill very quickly. A qualifying race is required: runners must have completed a 50-mile event within 15 hours between 1 January 2020 and race day. The race is part of Centurion Running's Grand Slam of four 100-mile races; Grand Slam entries open alongside individual race entries. The 2026 date was 2 May; 2027 entry details are expected to be announced later in 2026.
Is the Thames Path 100 a WSER Qualifier? Yes — Plus the 50-Mile Qualifying Standard Explained▼
Is the Thames Path 100 a WSER qualifier and what does that mean?
Yes. The Thames Path 100 is a qualifying race for the Western States Endurance Run (WSER), the most prestigious 100-mile trail race in the world, held annually in California. To use the TP100 as a WSER qualifier, runners must finish the race within the cut-off time (30 hours) in the year of their WSER application. Runners still enter the WSER lottery separately — completing a qualifier gives one lottery ticket, with additional tickets for each subsequent year of unsuccessful applications. The TP100 also has UTMB Running Stones (7.02 stones awarded on completion). WSER qualification applies to finishers of the full 161km distance only.
Fichiers de course
Logistique
Aéroport le plus proche
London Heathrow (LHR) / Gatwick (LGW)
Notes
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