日本を走ろう 第6回 SUWA LAKE 100k ウルトラマラソン ＆ ウォーキング

SUWA LAKE 100k Ultramarathon & Walking is a lap-format running and walking event based at Suwako Lakeside Park, also referred to as Sekicho Park, in Suwa, Nagano. The event uses an automatic timing system with IC tags, and lap-by-lap results are distributed online. Participants who stop before finishing can still receive a certificate showing the point they reached, making the event suitable for runners using it as a serious challenge or preparation for future long-distance goals. The venue is planned to provide baggage storage and changing facilities, and the repeated-loop format makes it easier for participants to manage clothing changes and personal nutrition. Aid stations are planned on the course, with the organizer emphasizing self-sufficiency and eco-conscious participation through personal bottles and cups. The lakeside setting is also close to Suwa’s hot spring district, so participants can combine the race atmosphere with a post-event soak nearby. The event features guest runners and an MC, and the organizer highlights age-group recognition for older runners. Overall, it is presented as a community-oriented endurance event around Lake Suwa, combining measured competition, participant support, and the appeal of a hot spring lakeside venue.