2026 National Alps Azumino Park Omachi/Matsukawa District Splash Land: A Full-Day Course

This is a full-day outing centered on Splash Land (スプラッシュランド) at the National Alps Azumino Park (国営アルプスあづみの公園) Omachi/Matsukawa District in Omachi City. It's a seasonal water-play facility listed on the official website, running from July 19 to August 31 in 2026. The large artificial water-play pool itself is free — the only cost is the park admission fee of 450 yen for adults (free for junior-high age and under, 210 yen for seniors, and parking is free). The park also has the Forest Experience Hall (森の体験舎), an elevated walkway through the woods (林の中の空中回廊), and the spacious Grand Prairie House (大草原の家), so there's plenty to do all day, both before and after the water play. In the morning, start off with a relaxed visit to Azumino Chihiro Park (安曇野ちひろ公園), named for picture-book artist Chihiro Iwasaki, then head to the park around lunchtime. In the afternoon, splash away and make the most of summer. Although the location sits at the foot of the Northern Alps, the mountain ridgeline is often hazy with summer humidity at the height of summer, so it's best to think of a clear view as a bonus if you get one.