Shiga Kogen Summer Hiking Trails: Maruike, Hasuike & Alpine Pond Circuit

TL;DR: The Maruike-Hasuike alpine pond circuit is a 2.4km boardwalk loop taking 60-90 minutes, with peak wildflowers from mid-July to early August.

My first summer in Shiga Kogen, I rode the Yokoteyama lift expecting just blueberries and got a 360° view of the Japan Alps that made me sit on the deck for an hour. I missed the last bus down. Worth it. But when I came back the next year with my kids, I needed something more accessible — something that didn't require perfect timing or risk stranding us on a mountaintop. That's when I found the alpine pond circuit.

These summer hiking trails around Maruike and Hasuike give you everything I loved about that Yokoteyama summit — wildflowers, mountain air, that sense of being somewhere completely different from Tokyo — except with wooden boardwalks instead of scrambling over rocks, and parking lots instead of last-bus anxiety.

What makes the alpine pond circuit special?

The Maruike-Hasuike circuit connects two distinct wetland ecosystems with a 2.4km trail that's about 90% boardwalk. Unlike the steep climbs to Yokoteyama or the rocky scrambles around Okushiga, this route stays pretty flat — you're only gaining 80 meters between the two ponds.

Maruike ("Round Pond") lives up to its name — a perfect circle of dark water surrounded by sphagnum moss and cotton grass. The 1.2km boardwalk that rings it takes about 20 minutes to walk, but honestly, I've never done it that quickly. There's always something blooming, some bird I don't recognize, or a view of Mount Asama poking through the clouds that makes me stop and stare.

Hasuike ("Lotus Pond") is the bigger, messier sibling — irregular shape with fingers of water extending into the marsh. The lotus blooms here aren't the dramatic pink ones from Tokyo parks — they're smaller, white, and scattered among the reeds. But in late July, when the evening light hits them just right (and — honestly, the mosquitoes aren't terrible at dusk —), it's worth the hike up.

When should you hike the alpine pond circuit?

Mid-July through early August is when you'll see the best wildflower displays. Cotton grass blooms first around mid-July, then alpine asters and gentians show up in late July and August. I've done these trails in June, July, and September, and the timing really does make a huge difference in what you see.

Cotton grass at Maruike peaks around July 20th in most years — those white tufts that look like someone scattered cotton balls across the marsh. Only lasts about two weeks before the seeds take off, so if that's specifically what you're after, timing really matters.

How long does the full alpine pond circuit take?

The complete circuit — Maruike perimeter, connecting trail to Hasuike, and the way back — covers 4.8km and takes 90-120 minutes at a relaxed pace. But you can break this into shorter chunks depending on how much time and energy you've got.

Here's how I usually do it with my family:

1. Maruike loop (1.2km, 25-30 minutes): Start at the main parking area and follow the boardwalk clockwise. North side's got the best mountain views, while the south side has more interesting plants.
2. Connecting trail to Hasuike (2.4km, 45 minutes): This is where it gets a bit tougher, with some uphill sections and a few muddy spots where the boardwalk ends. But you're rewarded by walking through different forest types — from wetland birch to higher-elevation spruce.
3. Hasuike exploration (variable, 20-45 minutes): No formal trail here, just several boardwalk fingers extending into the marsh. Pick the ones that look interesting and double back when you've seen enough.
4. Return route (2.4km, 35-40 minutes): Same connecting trail, but downhill feels faster.

Honestly, if you're short on time or hiking with small kids, just do the Maruike loop. You get the most scenic part and the full alpine pond experience without committing to the longer connecting trail.

How do I reach the Shiga Kogen summer hiking trails?

Both trailheads are accessible by car via Route 292 — Maruike's about 25 minutes from Shiga Kogen Prince Hotel, and Hasuike is another 5 minutes further up. Public transportation is limited but doable.

From the main Shiga Kogen hotels (Prince Hotel, Shiga Palace):

• By car: Take Route 292 toward Kusatsu. You'll see Maruike parking clearly marked on the left. Hasuike parking is 2km further up the same road.
• By bus: The Shiga Kogen shuttle bus runs to Maruike during summer (July-September), but only twice daily. Check current schedules at your hotel.
• By bike: Route 292 doesn't have much of a shoulder, but I've seen cyclists do it. You're looking at about 200m elevation gain from the Prince Hotel area.

Parking's free at both spots, with room for about 30 cars at Maruike and 15 at Hasuike. Weekends fill up by 10 AM during peak season.

What should I pack for alpine pond hiking?

Insect repellent and long pants are non-negotiable from June through August — these wetlands mean mosquitoes and biting flies are everywhere. Even on warm days, I'm wearing long sleeves and pants around the marshes.

Here's what I always bring:

• Insect repellent (DEET-based works best)
• Water (no facilities on the trails)
• Light rain jacket (mountain weather changes fast)
• Camera with telephoto lens (for birds and distant mountain shots)
• Comfortable walking shoes (boardwalks get slippery when wet)
• Small backpack for layered clothing

Those boardwalks get slippery when it rains, and afternoon thunderstorms are basically a guarantee in July and August. I've been caught in sudden downpours twice and learned the hard way to pack rain gear even when the morning looks clear.

What else can I explore near the alpine ponds?

If you're feeling ambitious, the Shirane-san trail connects from Hasuike to the 2,171m summit in about 2 hours. That'll turn your pond visit into a proper mountain climb. But — this isn't a boardwalk stroll. It's steep, rocky, and needs proper hiking boots.

For families or folks looking for something less intense, there's plenty to do around both ponds:

• Birdwatching: I've spotted Japanese accentors, skylarks, and several warbler species around the marshes
• Photography workshops: Some Tokyo camera clubs run weekend workshops here during peak wildflower season
• Botanical walks: The variety of alpine and wetland plants in such a small area makes this great for plant identification
• Picnicking: Several benches around Maruike, though shade is pretty limited

The connecting trail between ponds passes through three distinct plant communities — wetland, mixed forest, and alpine meadow — so it feels like way more than 2.4 kilometers compressed into one afternoon.

How does this compare to other Shiga Kogen summer hikes?

The alpine pond circuit is your most accessible mountain hiking experience in Shiga Kogen, while trails like Yokoteyama and Shirane-san offer more dramatic views but take significantly more time and effort. It's the best entry point to high-altitude hiking for families or anyone testing whether mountain trails are actually their thing.

What I really like about the pond circuit is how much variety fits into such a short distance. You get wetland ecology, mountain views, wildflowers, and that sense of being deep in the mountains — all wrapped up in 90 minutes of hiking. Perfect for figuring out whether your kids (or you) are ready for longer Shiga Kogen adventures.