This race has finished.
The next edition is undecided. Please check the official site.
Status updated: June 18, 2026
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Chiba
Ultra Marathon
10th Anniversary Minamiboso 100km & 75km Michikusa Ultra Marathon
第10回記念大会 南房総100km・75kmみちくさウルトラマラソン
Date
January 31, 2026
Location
Chiba
Venue
千葉県（勝浦市
Distance
Ultra Marathon
| Event | Entry Fee | Time Limit | Capacity |
|---|---|---|---|
| 100km | ¥20,000 | — | — |
| 75km | ¥16,000 | 14h 15m | — |
Finish Rate
—
Last updatedJune 18, 2026·14 days agoOfficial site checkedJune 18, 2026
AI summary
ULTRAAid stations
Standard100 km: 20 locations; 75 km: 16 locations
Mandatory gear
Headlights
Time limit & cutoffs
Time limit: 14 hours and 15 minutes (until 7:15 p.m.); Checkpoint: Hamachaya Taikai (9 hours and 15 minutes from the start; 65.7 km mark for the 100 km course; 41.5 km mark for the 75 km course)
Pacers
Allowed
Drop bag
Allowed
Start time
5:00–5:15 Wave Start (On-site registration: 3:30–4:30)
Summary for guidance. Always confirm mandatory gear and rules on the official site. Last verified: June 19, 2026
Access
ACCESSNote: the map shows the approximate area. Check the official site for the exact start/venue.
Score
RATINGSAuto-calculated from market research, official data, and online voicesSome scores unavailable（3/6）Course Appeal
コースの魅力
N/A
Organization & Support
運営・サポート
N/A
Finishability
完走しやすさ
0.7
Atmosphere
大会の盛り上がり
N/A
Access
アクセス
3.0
Value for Money
コスパ
2.5
Runner Reviews
REVIEWSNo runner reviews for this race yet.