18th International Alexander the Great Marathon

This trail marathon in Thessaloniki offers a forgiving course with just 114 meters of elevation gain spread across the 42.2 kilometers, making it a solid option for runners who want to avoid steep climbs without sacrificing a proper trail experience. The route stays relatively low, ranging between 2 and 49 meters above sea level, so you won't deal with sustained climbing or dramatic descents, but you will get the varied surface and technical demands that come with trail running. April's timing in Greece works in your favor for pacing and recovery, and the event's long history as an 18-time race suggests solid organization and well-maintained trails. The flat-to-gently-rolling terrain means you can focus on running your race rather than managing a mountain profile, which makes this a good choice if you're looking for a genuine trail marathon that won't leave you broken at the finish.