As I was looking for a way to continue my exploration of western Gunma, I found a section of the “Kanto Fureai no Michi” surrounded by four previously climbed peaks: Mt Jomine, Mt Mikabo, Mt Sakura and Mt Yokogai. The highlights were a viewpoint of Kanna lake and a river gorge; on the downside, the route followed paved roads instead of hiking paths. I wasn’t worried about access, since I had traveled to the area before. It would be a short hike, so I could leave later than usual. Although most of the hike would be inside Saitama, except the river gorge, I would be arriving and leaving via Gunma. The weather was supposed to be fine all day, and although I wouldn’t be summiting any mountains, I was hoping to get some good views along a hidden valley close to Tokyo.
Hiking the Kanto Fureai no Michi 関東ふれあいの道
Kanna lake and Shimokubo dam from Jomine Park
I had only a few minutes to transfer to the bus after arriving at Shinmachi station around 10h30. I got off one hour later, a couple of stops before the dam and the lake, seemingly in the middle of nowhere. I could see Jomine park and the dam straight ahead, so I got my bearings easily. After getting ready, I used my phone GPS to find my way to the bottom of the river valley. I crossed the bright red Tosenkyo bridge (登仙橋), also crossing into Saitama prefecture at the same time, and walked up the road opposite, alongside a small river.
Straight ahead and at the top of the mountain, Jomine park
Looking downstream (left) and upstream (right) from Tosenkyo Bridge
I soon spotted a small path next to the river and immediately switched to it so that I could better enjoy the sight and sound of the rushing water. I was now walking inside Tobagawa river park (鳥羽川河川公園). At 1pm, I rejoined the road, which climbed steeply and away from the river. Half an hour later, I reached a junction: straight ahead the road continued to the top of Mt Jomine, 4km away and 500m higher; however, I took a sharp turn to the right, along a gently rising, almost flat road.
A pleasant stroll through Tobagawa river park
Yellow iris next to Toba river
I now had my first good view of the day: looking east, I could make out the top of Mt Yokogai which I had climbed just one month ago; huge cumulus clouds were crowding the sky to the south, and although rain was forecasted closer to Tokyo, the surrounding mountains were still in the sun. At 2pm I arrived at Jomine Park (城峰公園) and had lunch at the observatory overlooking Kanna lake (神流湖) to the north. Beyond it, I could see the rounded top of Mt Sakura.
The only hiking path on this “hike”
Cloudy weather to the south over Chichibu
After lunch, I made a quick tour of the park and found another less impressive viewpoint on the other side, and at 3pm, I headed down a wide road leading to the dam. After only a few minutes, I reached a shortcut following a log staircase overgrown with grass; it was the first and only hiking path of the day. Less than 10 minutes later, I was back on the road. At 4pm, I was on the pedestrian road that ran along the top of Shimokubo dam (下久保ダム).
The blue-green water of Kanna lake
Kanna lake, a hidden gem
This was the second highlight of the day: looking west, I could see Kanna lake sparkling under the afternoon sun; turning around, I could see the impressive ravine through which flowed the Kanna river. After walking up and down the dam, I headed down into the deep valley on a road closed to traffic; 15 minutes later, I was at the entrance of the Sanbaseki Gorge (三波石峡). Although the riverside path is no longer in use, I could approach the river via four small paths situated at regular intervals along a road.
Looking down at the river gorge from the lake dam
Solar panels getting the sun at the end of the hike
Each riverside spot was like straight out of a fairytale: at the first two, the clear water rushed through huge boulders, 48 of which have names; at the last two, the light-green water flowed lazily under grey cliffs. The sinking sun shone down the valley through the leaves and onto the water; a slight breeze blew occasionally, its coolness welcome on a warm day. I took a short break at the third spot and enjoyed this magical secluded place.
Kanna river in the late afternoon sun
A magical spot along the Sanbaseki Gorge
It was now past 5pm and my bus was due in half an hour. I continued along the road at a fast pace and soon arrived back at the red bridge which I had crossed five hours ago. Huge grey clouds had now spread above, and it seemed like it could rain at any moment. I quickly climbed out of the valley back to the bus stop. One hour later I was at Shinmachi station, from where it was a 90 minute train ride back to Tokyo.