The Lake Tazawa Marathon is an annual road race held each September around the serene, deep-blue waters of Lake Tazawa in Akita Prefecture, Japan. Known for its scenic beauty and challenging hills, the event features a certified full marathon (42.195 km), as well as 20 km, 10 km, and a 3 km pair run designed for families and friends. With crisp autumn air and vibrant foliage, runners enjoy a memorable course that loops Japan’s deepest lake at 423 meters. The marathon attracts thousands of participants from across Japan and abroad, supported by enthusiastic local volunteers and ample aid stations. Whether you're chasing a personal best or simply soaking in the natural beauty, the Lake Tazawa Marathon offers something for every level of runner.
Races
Marathon
20 km
10 km
3 km
Race Date:
21 September, 2025
The Lake Tazawa 20 km race is a mid-distance event held each September along the scenic lakeside roads of Lake Tazawa in Akita Prefecture. Open to runners aged 16 and older, it features a moderately hilly certified course that blends natural beauty with a well-supported race atmosphere.
Weather based on historical averages.
FAQs
What is the Lake Tazawa 20km?
How long is the Lake Tazawa 20km?
Where does the Lake Tazawa 20km take place?
What is the elevation gain of the Lake Tazawa 20km?
How can I prepare for the Lake Tazawa 20km?
How do I choose the right training plan for the Lake Tazawa 20km?
The Lake Tazawa 20 km race is a mid-distance event held each September along the scenic lakeside roads of Lake Tazawa in Akita Prefecture. Open to runners aged 16 and older, it features a moderately hilly certified course that blends natural beauty with a well-supported race atmosphere.
The Lake Tazawa 20km is 20km long.
The Lake Tazawa 20km takes place in Semboku, Akita Prefecture, Japan.
Runna classifies the Lake Tazawa 20km elevation profile as Moderate.
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the Lake Tazawa 20km?
The Lake Tazawa 20 km race is a mid-distance event held each September along the scenic lakeside roads of Lake Tazawa in Akita Prefecture. Open to runners aged 16 and older, it features a moderately hilly certified course that blends natural beauty with a well-supported race atmosphere.
How long is the Lake Tazawa 20km?
The Lake Tazawa 20km is 20km long.
Where does the Lake Tazawa 20km take place?
The Lake Tazawa 20km takes place in Semboku, Akita Prefecture, Japan.
What is the elevation gain of the Lake Tazawa 20km?
Runna classifies the Lake Tazawa 20km elevation profile as Moderate.
How can I prepare for the Lake Tazawa 20km?
The best way to train for the next race is to use a personalised training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the Lake Tazawa 20km?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalised training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Running
Tags:
Nature
Team
Kid friendly
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by Lake Tazawa Marathon or Nara Marathon Executive Committee. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the Lake Tazawa Marathon website.
