Please take a look at http://4travel.jp/traveler/airpentaro/album/10398206/ for details of this walk (in Japanese)
 
Meet at the JR Ohme Line’s Okutama Station’s Ticket Gate at 10:25AM.  From Shinjuku, take the JR Holiday Special Rapid Okutama#5 (going to Okutama) at 8:47AM.  This arrives at Okutama Station at 10:23.  Be sure to arrive on this train as we will be unable to wait for the next one, since we will be taking the 10:30 bus from just outside the station.
 
Meet on the front of the 8:47 train at Shinjuku if you want to go from there there.  David will get on the first car of the same train at Nakano Station.
 
Please wear appropriate shoes (tennis shoes, hiking boots), bring a lunch to eat on the mountain, and plenty of liquids and a swimsuit if you want to swim.
 
Course (from Okutama Station): Okutama Station – Okutama Lake (by bus – 15 minutes) – Old (Therapy) Road – Shidakura Suspension Bridge – Tama Rive (SWIM) – Okutama Station
 
Walking Time: About 5 hours