This certified race is billed as Japan's fastest course, with less than 2 m of elevation difference. It is a 10 km loop along the Arakawa riverbed starting and finishing at Toda Bridge athletics stadium, with races over the full marathon, 30K, half marathon, 10K, 5K and 1 mile. Pacers cover 12 groups, from 2:30 to 4:20 for the marathon. Water is available every 3 to 4 km and food once every 10 km. Registration opens at 8:00 and the main races start at 9:30, with the 1 mile at 9:35. Entry fees are 11,000 yen for the marathon, 7,700 yen for the half and 30K, 5,500 yen for the 10K and 3,300 yen for the 5K and 1 mile, with 10 percent off for registered R.LEAGUE members from their second start. The race is a partner event of TEAM ONE TOKYO, a ranking program offering a chance at Tokyo Marathon entry. Time limits run from 12 minutes for the mile to 4 hours 30 minutes for the marathon.
Races Offered
1 Mile
Nov 07, 2026
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Distance —
1.6K
terrain
Type —
Running
timer
28 days remaining
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$21.29
10km
Nov 07, 2026
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Distance —
10K
terrain
Type —
Running
timer
28 days remaining
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$35.48
30km
Nov 07, 2026
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Distance —
30K
terrain
Type —
Running
timer
28 days remaining
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$49.66
5km
Nov 07, 2026
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Distance —
5K
terrain
Type —
Running
timer
28 days remaining
sell
$21.29
Full Marathon
Nov 07, 2026
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Distance —
42.2K
terrain
Type —
Running
timer
28 days remaining
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$70.95
Half Marathon
Nov 07, 2026
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Distance —
21.1K
terrain
Type —
Running
timer
28 days remaining
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$49.66
[R.LEAGUE Registered] 1 Mile
Nov 07, 2026
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Distance —
1.6K
terrain
Type —
Running
timer
28 days remaining
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$19.35
[R.LEAGUE Registered] 10km
Nov 07, 2026
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Distance —
10K
terrain
Type —
Running
timer
28 days remaining
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$32.25
[R.LEAGUE Registered] 30km
Nov 07, 2026
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Distance —
30K
terrain
Type —
Running
timer
28 days remaining
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$45.15
[R.LEAGUE Registered] 5km
Nov 07, 2026
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Distance —
5K
terrain
Type —
Running
timer
28 days remaining
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$19.35
[R.LEAGUE Registered] Full Marathon
Nov 07, 2026
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Distance —
42.2K
terrain
Type —
Running
timer
28 days remaining
sell
$64.50
[R.LEAGUE Registered] Half Marathon
Nov 07, 2026
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Distance —
21.1K
terrain
Type —
Running
timer
28 days remaining
sell
$45.15
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Event name — (Tokyo Arakawa) THE CHALLENGE RACE 40 - JAAF-Certified Race (【東京荒川】THE CHALLENGE RACE 40|日本陸連公認レース).
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