Oct 13, 2019 - 8:56 PM
in reply to jwu92
Hi jwu92 and welcome to MySwissAlps!
Congratulations for wanting to visit Switzerland in November. It is probably the month with the least amount of other tourists. The backside is that many cablecars and gondolas are indeed closed for maintenance.
Trails are never "closed" as such, unless something dangerous is being feared or has happened (landslide, forestry works and the like). Hikers use trails at their own risk, and nobody monitors the hiking trails (unlike many, but not all, skiing trails where there is a ski patrol). Nobody will prevent you from using any trail. On November 20 there is a chance of a thin layer of snow around First and Bachsee. If you are well trained, have good boots, warm clothes, and other equipment such as a thermos bottle, nobody will prevent you from doing the planned hike. Going up and down from Grindelwald will require the entire daylight time of the day. If you are not well trained or if the weather is bad, do something else. And don't go alone.
Have a great time!