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Your complete Slovenia 2025 marathon calendar. Find every marathon happening in Slovenia in 2025 with comprehensive race details, registration information, and official results, including the Three Hearts Marathon (Radenci), and Ljubljana Marathon (Ljubljana).
Each marathon listing includes a 2025 marathon guide including dates, locations, course details, weather conditions, and relevant links for registration and more information. We maintain the most current results database, publishing official results on race day, plus complete 2024 results for year-to-year comparison.
Radenci, Slovenia
May 17, 2025
The Three Hearts Marathon captivates runners with its rare cross-border course, allowing participants to traverse both Slovenia and Austria multiple times while enjoying picturesque countryside views. As the oldest marathon in southeastern Europe, it combines historical significance with a welcoming atmosphere, offering various race distances that cater to everyone from beginners to seasoned athletes.
Ljubljana, Slovenia
October 19, 2025
The Ljubljana Marathon offers a picturesque course that winds through the heart of Slovenia's capital, featuring iconic sights such as the Ljubljanica River, Ljubljana Castle, and Tivoli Park. Celebrated as Slovenia's largest running event, this marathon combines scenic beauty with a vibrant cultural atmosphere, drawing around 25,000 participants and fostering a strong community spirit.