2026年の正月には、路面凍結の影響で県道が通行止めとなり、参拝者が駐車場で一夜を明かすことになったそうです。実際に訪れてみると、秩父の山奥にある標高の高い神社であり、降雪時にそのような状況になるのも納得できました。
車で訪れる場合は、花園IC方面、山梨市方面、入間方面のいずれからでもおおむね1時間半から2時間程度かかります。また、写真に掲載した時刻表のとおり路線バスの本数は少なく、公共交通機関でのアクセスはあまり良いとは言えません。
週末の午後に訪問しましたが、駐車場へ入るまで15分ほど待ちました。ただし駐車場は広く、出庫する車も多いため、それほど長く感じませんでした。普通車の駐車料金は1日520円です。
三峯神社奥宮まで足を延ばさず、拝殿を中心に参拝するのであれば、それほど長距離を歩く必要はなく、体力的な負担は比較的少ないと思います。
参道途中で販売されている味噌だれの焼き餅はとても美味しく、おすすめです。
また、車で駐車場まで登るだけでなく、大輪地区から表参道（清浄の滝経由）を歩いて参拝するルートもあるようです。距離は約2.7kmで、所要時間は45分程度とのことでした。
English follows.
It was reported that during the New Year holiday of 2026, icy road conditions caused the prefectural road leading to Mitsumine Shrine to be closed, forcing some visitors to spend the night in the parking area. After visiting in person, I could understand why this happened, as the shrine is located deep in the mountains of Chichibu at a relatively high elevation.
If traveling by car, it takes roughly 1.5 to 2 hours from the Hanazono IC area, Yamanashi City area, or Iruma area. As shown in the bus timetable I uploaded, bus services are infrequent, so access by public transportation is not particularly convenient.
I visited on a weekend afternoon and had to wait about 15 minutes to enter the parking lot. However, the parking area is quite large and cars leave regularly, so the wait did not feel excessive. Parking for a standard passenger car costs 520 yen per day.
If you plan to visit only the main shrine buildings and do not hike to the Okumiya (Inner Shrine), there is not much walking involved, and the physical demand is relatively low.
I highly recommend trying the grilled rice cake topped with miso sauce sold along the approach to the shrine. It was delicious.
In addition to driving directly to the shrine parking area, there is also a traditional approach route from the Owa district via the Omotesando trail and Kiyono Falls. The route is approximately 2.7 km long and takes about 45 minutes to walk.
