1. Berlin Marathon - Germany: Famous for its flat course, cool weather, and enthusiastic spectators, the Berlin Marathon usually produces the fastest times of the year.

2. New York City Marathon - USA: The world’s largest marathon, taking runners through all five boroughs of the city.

3. Boston Marathon - USA: The world's oldest annual marathon, it draws over 20,000 participants each year. It's also part of the prestigious World Marathon Majors.

4. London Marathon - UK: Another member of the World Marathon Majors, the London Marathon is known for its iconic course and overwhelming crowd support.

5. Tokyo Marathon - Japan: A major sporting event in Japan and a member of the World Marathon Majors, the Tokyo Marathon is known for its beautiful views of the city.

6. Chicago Marathon - USA: This fast and flat course takes runners through 29 of the city's diverse neighborhoods.

7. Rotterdam Marathon - Netherlands: Known for being incredibly flat and fast, this marathon is a favourite among seasoned runners.

8. Paris Marathon - France: With a course that takes runners past some of the most iconic sights in Paris, this is one of the most beautiful marathons in the world.

9. Honolulu Marathon - USA: This marathon is known for its beautiful course through the Hawaiian capital and is popular among both professional and casual runners.

10. Great Wall Marathon - China: Known for its challenging course that includes a stretch on the Great Wall of China, this marathon is a test of endurance.

Please note that the ranking may vary based on individual preferences and experiences. All the marathons listed above are well-known and highly respected.

Determining the "best" marathon is subjective and depends on individual preferences. Some runners prioritize fast courses, while others value atmosphere, scenery, or historical significance. However, based on popularity, prestige, and reputation, here's a list of 10 marathons often considered among the world's best:

Top 10 Marathons (in no particular order beyond #1):

1. Boston Marathon (USA): The oldest annual marathon, known for its challenging course, rich history, and strict qualifying standards. Running Boston is a bucket-list item for many.

2. New York City Marathon (USA): A massive and iconic race that winds through all five boroughs of NYC, offering unparalleled crowds and a vibrant urban experience.

3. London Marathon (UK): Another of the World Marathon Majors, London is famous for its flat, fast course, charity fundraising focus, and enthusiastic crowds.

4. Berlin Marathon (Germany): Renowned for its flat, fast course and often sets world records. A great option for runners chasing personal bests.

5. Chicago Marathon (USA): Another fast and flat course in the heart of the Windy City. Well-organized and known for its supportive spectators.

6. Tokyo Marathon (Japan): A well-organized and culturally rich race that takes runners through the vibrant streets of Tokyo. Part of the World Marathon Majors.

7. Paris Marathon (France): A scenic race that showcases the beautiful landmarks of Paris, including the Eiffel Tower and the Louvre.

8. Marine Corps Marathon (USA): Held in Washington D.C., this race is known as "The People's Marathon" for its focus on the runners rather than elite athletes. It is extremely well organized, and offers great support.

9. Comrades Marathon (South Africa): An ultramarathon that alternates directions each year (uphill one year, downhill the next) between Durban and Pietermaritzburg. It is a culturally significant event with a unique spirit and a distance of approximately 89-90 km (around 56 miles).

10. Florence Marathon (Italy): A scenic course that weaves through the heart of Florence, passing iconic landmarks like the Duomo and Ponte Vecchio. It offers a more intimate and historical experience than some of the larger races.

Factors to Consider When Choosing a Marathon:

• Course Difficulty: Flat and fast vs. hilly and challenging.
• Atmosphere: Big city energy vs. more intimate and scenic.
• Logistics: Travel, accommodation, and registration.
• Qualifying Standards: Some races require qualifying times.
• Time of Year: Consider the weather conditions.
• Personal Goals: Are you aiming for a personal best, or just want to experience the race?
• Cost: Entry fees, travel, accommodation, food, etc. all add up.

This list provides a starting point for your marathon research. Happy running!

Determining the "best" marathon can be subjective, as it depends on factors such as the course, the atmosphere, the organization, and personal preferences. However, here is a list of 10 marathons that are widely regarded as some of the best in the world:

1. Berlin Marathon (Germany)

2. Known for its flat and fast course, the Berlin Marathon is a favorite among runners aiming for personal bests and world records.

3. London Marathon (United Kingdom)

4. One of the largest marathons in the world, the London Marathon is famous for its enthusiastic crowds and iconic landmarks.

5. New York City Marathon (USA)

6. Often considered the most iconic marathon, the New York City Marathon features a diverse course that spans all five boroughs of the city.

7. Boston Marathon (USA)

8. The oldest annual marathon in the world, the Boston Marathon is known for its challenging course and rich history.

9. Chicago Marathon (USA)

10. Another flat and fast course, the Chicago Marathon is known for its scenic route through the city's neighborhoods.

11. Tokyo Marathon (Japan)

12. The Tokyo Marathon is known for its efficient organization and the unique experience of running through one of the world's most populous cities.

13. Paris Marathon (France)

14. The Paris Marathon offers runners the chance to experience the beauty of the city, with the course passing landmarks like the Eiffel Tower and Notre-Dame.

15. Amsterdam Marathon (Netherlands)

16. Known for its flat course and vibrant atmosphere, the Amsterdam Marathon is a favorite among European runners.

17. Vienna City Marathon (Austria)

18. The Vienna City Marathon is known for its scenic route through the historic city and its festive atmosphere.

19. Marine Corps Marathon (USA)

    • Held in Washington, D.C., the Marine Corps Marathon is known for its patriotic atmosphere and challenging course.

These marathons are celebrated for various reasons, and each offers a unique experience for participants.

Here are the top 10 best marathons in the world, based on their popularity and reputation:

1. New York City Marathon - Known for its large international field and diverse course through five boroughs[1][5].
2. Boston Marathon - The oldest and one of the most prestigious, with strict qualifying standards[1][5].
3. Berlin Marathon - Famous for its fast course and world records[1][4].
4. Chicago Marathon - One of the fastest and most diverse races, part of the World Marathon Majors[2][5].
5. London Marathon - A major event with a large and active crowd[1].
6. Tokyo Marathon - Known for its flat course and cultural landmarks[2][4].
7. Sydney Marathon - A scenic race that is part of the World Marathon Majors[2].
8. Great Wall Marathon - Challenging with over 5,000 steps on the Great Wall of China[3][6].
9. Paris Marathon - A popular race with international participation through beautiful Parisian landscapes[1].
10. Stockholm Marathon - A scenic course through the city's islands and landmarks[1][3].

These marathons offer unique experiences, from scenic beauty to historical significance and fast courses.