Trail RunningUTMB Index Races

Lake Biwa 100

Trail Running covering 169 km with up to 10,500 m D+ in Ōtsu (Shiga Prefecture, Japan)

LocationŌtsu, Shiga Prefecture, JapanShow on map(35.0178° N, 135.8552° E)
Date & StatusOctober 29, 2027 to October 31, 2027Date confirmed
Elevation gainUp to +10,500 m

Lake Biwa 100 is an endurance sporting event in Ōtsu, Shiga Prefecture, JP focused on Trail Running. It is part of UTMB Index Races. Key features include Nature & Off-Road, Forest, Lakes & Ponds, Mountain.

The competition program features Trail 169 km (169 km, +10,500 m D+). The next edition is officially confirmed from October 29, 2027 to October 31, 2027. Official race regulations, course details, and registration information are provided on the organizer's website (lakebiwa100.com).

Official website
Lake Biwa 100 in Ōtsu (Work: "Mount Fuji from Lake Yamanaka", Photo: Alpsdake, License: CC BY-SA 4.0, Source: Wikimedia Commons)
"Mount Fuji from Lake Yamanaka" · Photo: Alpsdake · Wikimedia CommonsCC BY-SA 4.0
Cropped to 16:9 (960 × 540 px), WebP · Shared under the same license

Event characteristics

Nature & Off-RoadForestLakes & PondsMountainHigh AltitudeMulti-Day

Races & distances (1)

CompetitionDisciplineDistanceElevation gainAltitude rangeCourse typeCourse & profile
Trail 169 kmTrail Running169 km+10,500 m1,150 m - 5,560 mLoop courseRoute & profile
Course & Elevation Telemetry

Course route & map

Trail 169 km169 km
Distance
169 km
Elevation gain
+10,500 m D+
Elevation loss
-10,500 m D-
Altitude range
1,150 m - 5,560 m
Gradient (Avg / Max)
12.4 % / 22.3 %
Course format
Loop course
169 km+10,500 m D+
Start (S)Finish (F)
N255075100125150FS35.0178° N, 135.8552° E

Elevation profile & course telemetry

Altitude from 1,150 m to 5,560 m above sea level (+10,500 m D+, -10,500 m D-)

Peak: 5,560 m·at 59 km·Ø 12.4 %
1,150 m2,620 m4,090 m5,560 m0 km33.8 km67.6 km101.4 km135.2 km169 km5,560 m
Event Information & Answers

Frequently asked questions (FAQ)

When and where does Lake Biwa 100 take place?

Lake Biwa 100 takes place in Ōtsu, Shiga Prefecture, JP (start area at coordinates 35.0178° N, 135.8552° E). The next edition is officially confirmed from October 29, 2027 to October 31, 2027.

What races and distances are offered at Lake Biwa 100?

The competition program features Trail 169 km (169 km, +10,500 m D+). The competitions belong to Trail Running.

What is the course layout and elevation profile for Lake Biwa 100?

The main competition (Trail 169 km over 169 km) is designed as a loop course featuring +10,500 m of elevation gain and -10,500 m of elevation loss, ranging between 1,150 m and 5,560 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.

Where can I find registration and official race rules for Lake Biwa 100?

Official race regulations, course details, and registration information are provided on the organizer's website (lakebiwa100.com).