Sunday, July 5, 2026

Far from Madding Crowd: Sengokubara Nature Trail 仙石原自然探勝道

 


Walking past the memorial for Kobokusha, the strolling path becomes wider. We’re going through Dai-Hakone Country Club where sometimes PGA tournaments are held. Over the course on our left, there is a peculiar rock exposed on the slope of Mt. Marudake (丸岳 ASL 1156m). It has name, Daruma Rock. Long long before beyond human memory, it was supposed to be on the outer rim of Hakone Crater. Time made the rim fragile and slope failure occurred. That rock tumbled down from the ridge and situated itself there. On our right from the path is still smoke-billowing Owakudani. Hakone is actually an active volcano. We walk over a small bridge on a stream. In no time there comes a sign on our right saying “Sengokubara Shizen Tansho-do (Sengokubara Nature Trail 仙石原自然探勝道), This way.” Please depart from the cycling road and dive in it.

Daruma Rock beyond the golf course

A robot golf cart can come out.

A small stream down from our left

Adelante, por favor.

On our right it appears the signpost.

First 20m or so of this way is along the country club. Utility entrance for the golf course runs along the trail, but on our left, there is an ancient stone paved way which is typical of Hakone (; my posts for February 5 to March 5, 2021). This time, the terrain is FLAT! If you try this ancient civil engineering with your toddler, this section could be an ideal beginner’s entrance. I just wonder why such elaboration must have been done for mountain road 400 years ago … Probably, the route was a part of highway coming from Gotemba City 御殿場 on the slope of Mt. Fuji, via Nagao Pass 長尾峠 (ASL 911m), and reaching to Sengokubara Town. The community of Sengokubara still holds such traditional connections with Gotemba. I’ll tell you about it by the end of this month. 😉

Ancient and new roads

The flat paved way

This route is, for the first time for today’s itinerary, really a narrow trekking road in a forest. Yet, there are not many ups and downs. The paved ancient road eventually goes through a high wall of sasa-bamboos. They are Hakone-dake, Pleioblastus chino f. vaginatus, a very close relative for Azuma-nezasa, Pleioblastus chino (Franch. et Savat.) Makino var. viridis (Makino) Sad.Suzuki. Azuma-nezasa is ubiquitous in east Japan. Hakone-dake is found mainly in Hakone. Some say the plant is Hakone endemic, but genetic analysis seems to me does not endorse this claim. Still, the overall look of Hakone-dake is definitely slimer. The leaves of Hakone-dake are slenderer than their relatives in Yokohama. Once Botanist Mr. Teruo Katsuyama told me about any plants with name “Hakone” is slimmer or smaller than their relative in the world below. His guess was, due to colder climate in Hakone despite its latitude plants evolutionary adjusted their characteristics to their environment. For a kind of evidence of his conjecture, Hakone-dake can be found only in the forest where human afforestation took minimum even in Hakone. They have been there for centuries.

A small stream flows
in the field of Hakone-dake.

An ancient road goes through
an old field of Hakone-dake.

We soon find ourselves on a way running along Hayakawa River. Hello again! By this point, the River has enough water that would be difficult to be dried up. Basically, Hakone is a place where it rains a lot. Although the size of the river is not large enough to sustain population of Odawara, Hayakawa River keeps on going as river. We go ahead and cross Hayakawa River. After departing the field of Hakone-dake, I noticed there are lots of deciduous trees, like Maples and Bridal wreath, that will turn colors when autumn comes. During early summer with fresh verdure, it is an attractive enough strolling path. And the course will be impressive in fall. After crossing Hayakawa River, the route has a bit of going up with stone pavement. Then it becomes a comfortable stroll in beautiful forest. The exit of this trail is called Tsutsuji (Azalea) Street where in May many homes compete for flowering shrubs in their garden. After the housing area we find ourselves the road Shitsugen (Wetland) Street running in front of Hakone Botanical Garden of Wetlands (; my post for May 5, 2023). From the start of Kojiri Watergate, it is a leisurely walk of less than 3 hours. If you do not intend to go mountaineering, or want to avoid crowds of tourists in Hakone, this is a relaxing itinerary, especially with kids. Please try.

Hayakawa River again

We cross the bridge.

Beautiful early summer stroll



Ancient trekking path


The exit for the trail

Azalea Street in May 2026

Hakone Town Hall 箱根町役場

256 Yumoto, Hakonemachi, Ashigarashimo-gun,
Kanagawa 250-0398
〒250-0398 神奈川県足柄下郡箱根町湯本256

Phone: 0460-85-7111
https://www.hakone.or.jp/

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