The Challenge Race Tokyo presents an exhilarating running experience on October 11, 2026. Located along the Arakawa Riverbank Marathon Course near Hotta Bridge Stadium, this race offers various distances including full marathon, half marathon, and shorter options like a 30K run, 10K dash, and even a 5K event for all levels of runners. The course is renowned as one of Japan's fastest due to its minimal elevation changes. Participants can expect well-placed pacer groups along the route, ensuring that everyone from beginners to elite athletes has support throughout their race journey. Pacing options range widely, accommodating times between two hours and thirty minutes up to four hours and twenty minutes for full marathon runners. Hydration stations are strategically placed every three or four kilometers on the course, providing sports drinks, water, salt tablets, and energy snacks at key intervals. A main refreshment point is also available near the start line where participants can grab a quick bite before heading out onto the track. One of the unique features of The Challenge Race Tokyo is its ability to offer runners ample time for warm-up activities right up until five minutes prior to the race start, ensuring optimal performance conditions on the day. This flexibility allows competitors to fine-tune their pacing and prepare mentally as well as physically. For those interested in long-term racing goals or tracking personal achievements over multiple events, The Challenge Race Tokyo is part of R.LEAGUE—a comprehensive program that rewards runners with points based on participation, completion times, and overall performance across various races. Accumulating these points can lead to invitations for the biennial championship event as well as potential prize money opportunities. The race day schedule includes a brief opening ceremony at 9:10 AM followed by start waves beginning promptly at 9:30 AM with different distances starting in succession based on their pace groups and expected finish times. Entry fees vary depending on the distance chosen, ranging from ¥5,500 for a 10K run to ¥11,000 for the full marathon event. Race day registration closes one week prior to the scheduled date. Participants should be aware that race bibs and timing chips will be distributed at check-in upon arrival on October 11th. Be sure to return your chip after crossing the finish line as it is crucial for accurate results tracking. For those planning ahead, transportation options include walking approximately twelve minutes from Nishi-Tai Station along Tokyo's Sengoku Line or utilizing nearby parking areas that may incur a small fee. The Challenge Race Tokyo promises an engaging atmosphere and competitive spirit, making it a must-attend event for runners looking to push their limits on one of Japan’s most efficient marathon courses.
Races Offered
1 Mile
Oct 11, 2026
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Distance —
1.6K
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Type —
Running
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17 days remaining
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$21.29
10km
Oct 11, 2026
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Distance —
10K
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Type —
Running
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17 days remaining
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$35.48
30km
Oct 11, 2026
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Distance —
30K
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Type —
Running
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17 days remaining
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$49.66
5km
Oct 11, 2026
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Distance —
5K
terrain
Type —
Running
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17 days remaining
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$21.29
Full Marathon
Oct 11, 2026
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Distance —
42.2K
terrain
Type —
Running
timer
17 days remaining
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$70.95
Half Marathon
Oct 11, 2026
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Distance —
21.1K
terrain
Type —
Running
timer
17 days remaining
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$49.66
[R-League Registrants] 30km
Oct 11, 2026
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Distance —
30K
terrain
Type —
Running
timer
17 days remaining
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$45.15
[R-League Registrants] Half Marathon
Oct 11, 2026
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Distance —
21.1K
terrain
Type —
Running
timer
17 days remaining
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$45.15
[R.LEAGUE Registrants] 1 Mile
Oct 11, 2026
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Distance —
1.6K
terrain
Type —
Running
timer
17 days remaining
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$19.35
[R.LEAGUE Registrants] 10km
Oct 11, 2026
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Distance —
10K
terrain
Type —
Running
timer
17 days remaining
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$32.25
[R.LEAGUE Registrants] 5km
Oct 11, 2026
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Distance —
5K
terrain
Type —
Running
timer
17 days remaining
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$19.35
[R.LEAGUE Registrants] Full Marathon
Oct 11, 2026
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Distance —
42.2K
terrain
Type —
Running
timer
17 days remaining
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$64.50
Weather History
These values represent the 3-year monthly averages for October in Tokyo.
thermostatTemperature
15.5° / 22.6°
wb_sunnyFeels like
13.7° / 22.2°
light_mode
Avg sunshine hours
6h 54m
water_drop
Avg rainfall
4.3 mm
ac_unit
Avg snowfall
—
air
Avg wind speed
13.3 km/h (Gentle breeze)
opacity
Sweat loss rate
Moderate
terrain
Course conditions
Firm and slightly soft
sunny
Max UV Index
Moderate (4.0)
humidity_mid
Humidity
77.0%
wb_twilight
Sunrise
05:47
nightlight
Sunset
17:04
About Tokyo
Learn more about the host city, Tokyo.
Tokyo, officially the Tokyo Metropolis, is the capital and most populous city of Japan. The population of the city proper was over 14 million as of 2023. The Greater Tokyo Area, which includes Tokyo and parts of six neighboring prefectures, is the third-most populous metropolitan area in the world, with 33 million residents as of 2025.
Read what other athletes have to say about their experience at the Tokyo Arakawa Challenge Race 38 | JAAF Recognized Race (【東京荒川】THE CHALLENGE RACE 38｜日本陸連公認レース).
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Event name — Tokyo Arakawa Challenge Race 38 | JAAF Recognized Race (【東京荒川】THE CHALLENGE RACE 38｜日本陸連公認レース).
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