Aosta 21K
The Lowdown
Aosta 21K is a flat, certified half marathon through the historic Roman city center of Aosta, capital of Italy's Aosta Valley region, with Alpine views along the Dora Baltea river plain. The 21.0975 km course starts near Via Torino, threads past the former Cogne Acciai Speciali steelworks and the city's ancient monuments, and finishes at the Augustus Arch (Arco d'Augusto). Companion events on race weekend include the Auto Montblanc 10K, the non-competitive CAS Buongiorno Aosta 5K, and a 2K School & Family Game, and the event has been recognized as a low-environmental-impact race by EcoActions Legambiente. After running each May since its debut, organizers paused the 2026 edition to redevelop the event, announcing a return in May 2027. Registration for the 2027 edition had not yet opened as of this listing.
Race Day
Weather Forecast
Elevation
Terrain Profile
Relatively flat course
Participants
Field Size
Medium-sized race
Crowd Rating
Spectator Support
Good crowd energy
Arco d'Augusto (Augustus Arch)
Historic Roman city center of Aosta
Former Cogne Acciai Speciali steelworks site
Dora Baltea riverside cycle path
Other distances available during the event weekend:
Aosta, Aosta Valley, Italy
IT
Average rate for 3-star accommodations near the start line
Eligibility
- Must meet FIDAL/RUNCARD minimum age and medical certificate requirements for half marathon distance
Required Documents
- Photo ID
- Competitive medical fitness certificate (certificato medico agonistico) for Italian-affiliated runners
Entry Methods
- Online registration via aosta21k.com (registration for the 2027 edition was not yet open as of Sep 2026)
Cancellation & Refund Policy
Review the official cancellation policy on the organizer's registration page before registering
The 2026 edition was skipped; organizers announced a one-year pause to redevelop the event, stating on the official site 'AOSTA21K TORNERA, PIU BELLA CHE MAI, A MAGGIO 2027' (Aosta21K will return, more beautiful than ever, in May 2027)
2025-edition course records were roughly 1:03 for men and 1:14 for women on the flat, certified 21.0975 km course
Recognized as a low-environmental-impact event by EcoActions Legambiente
Also includes a non-competitive 2K School & Family Game the same weekend
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Community
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