Hello vmd12
Please kindly note, the railways in the Jungfrau area are operated by Jungfrau Railways, not SBB. For any operational questions, you would have to contact them: Phone: +41 33 828 72 33, E-Mail: info@jungfrau.ch
Currently, there are no trains operating between Grindelwald and Kleine Scheidegg. Also, the Restaurant Alpiglen is closed from 23. October 2023 due to summer end.
As a passionate mountaineer, I discourage you to hiking the Eiger Trail on rainy days. It is not advisable to hike this trail in falling rain or snow. It is not dangerous but challenging. And Wednesday, the weather forecast says rain: https://www.jungfrau.ch/en-gb/live/weather/
Kind regards,
Roland