Ecotrail Paris 47.5 km: Point-to-Point from Versailles Palace to Pont d'Iena — D+/km Rank 356 of 390 and 93% Finisher Rate Make This One of Europe's Most Accessible Trail Ultras

Ecotrail Paris 47.5 km is a point-to-point route of 47.5km with 800m D+ (16.8m per kilometre) from the Gardens of the Chateau de Versailles to Pont d'Iena in Paris 16e, passing through Domaine de Saint-Cloud. The course is 55.3% flat, 20.9% uphill, and 23.8% downhill. Average uphill gradient is +6.61%; average downhill gradient is -6.39% — smooth and non-technical throughout. The biggest single climb is 93m over 2.01km at km 27.60 (+4.65% average gradient); the biggest single descent is 92m over 1.05km at km 26.55 (-8.8% average gradient). The race starts at 10:00-10:15 AM from the Versailles palace grounds, with an 8h15 cutoff (finishing by approximately 6:15-6:30 PM) and a 93% finisher rate. Surface is 85% nature trail. No headlamp is required — this is a fully daylight race.

D+/km rank 356/390 and pct-flat rank 358/390 place Ecotrail Paris 47.5 km among the 35 least vertically demanding ultras in DTR's database of 390 European trail races. In practice this means a race that demands endurance and pacing discipline rather than technical mountain skills — the challenge is maintaining a consistent pace over 47.5km of rolling Ile-de-France terrain, not managing steep gradients or exposed ridgelines. The 93% finisher rate reflects this accessibility. The race is officially positioned as the natural next step for finishers of the 30km Trail and as an ideal transition for marathon runners moving to trail running. Mandatory gear is minimal: 1 litre water reserve, food reserve, eco cup, survival blanket, charged mobile phone, and photo ID — no headlamp or reflective armband required, consistent with an all-daylight start. 1,730 runners finished the 2025 edition.

Across six DTR ranking metrics for 390 European trail races, Ecotrail Paris 47.5 km sits near the bottom of the vertical-demand scale: D+/km rank 356/390 (35th lowest vertical density in Europe), pct-flat rank 358/390 (33rd most flat), average uphill gradient rank 350/390 (+6.61% weighted average), and top single ascent rank 343/390 (93m at +4.65% average). The average descent profile ranks 39/390 on the inverted scale (rank 1 = gentlest), meaning only 38 of 390 European trail races have smoother average descents — consistently non-technical terrain throughout. The top single descent ranks 345/390 (92m at -8.8% average). GPX formula_gain_dev_pct = +0.01625 (GPX overestimates official D+ by 1.6% — the tightest data match of the Ecotrail Paris distance family, confirming reliable course mapping).

Ecotrail Paris 47.5 km starts in the formal gardens of the Chateau de Versailles — a UNESCO World Heritage Site — and finishes at Pont d'Iena, the bridge at the foot of the Eiffel Tower in Paris 16e. The middle section passes through Domaine de Saint-Cloud, a 460-hectare wooded estate on the western edge of Paris, keeping 85% of the course on nature surface despite running entirely within Ile-de-France. The route runs broadly west-to-east from the historic royal suburbs through forested estates into the city, crossing the Seine valley before finishing on the Paris riverfront. Despite the urban setting, the terrain is consistently rolling and forest-edged — the course does not feel like a road race. March conditions in Ile-de-France are typically cool (5-12 degrees C) with a realistic chance of rain; the 10:00 AM start means the entire race happens in daylight.

Ecotrail Paris 47.5 km starts at 10:00-10:15 AM from the Gardens of the Chateau de Versailles, accessible by RER C to Saint-Cyr station followed by a free shuttle bus to the start area. Paris CDG Airport is approximately 77 minutes from the event hub; Paris ORY is also viable. The race finishes at Pont d'Iena in central Paris, easily reached by Metro and RER for return journeys. Entry is EUR97 standard (approximately EUR2.04 per kilometre); the 2026 edition went to waitlist-only before race day. For 2027, register as early as possible after registration opens — the sold-out pattern is consistent across all Ecotrail Paris distances. Bib pickup is Thursday/Friday before race day at Centre sportif Emile Anthoine in Paris. UTMB Index qualifier (20K/50K/100K tiers). FFA Label Silver.