<<"But I am still confused about all the loops we can take as I still need to do more research. Is there a map of the different loops to take all around? So far i have:">>
This large overview panoramic map can help you understand the lay of the land, but it does not have much detail:
www.swissholidayco.com /Public/Assets/User/fi les/Map-of-Jungfrauregion1.jpg
You can make your own loops, because of the large variety of paths and public transport. Some of the hikes listed here are parts of possible loops:
However, if you want loops by transport, the panorama map plus the maps I link below can show you options, and the timetable
can give you timing and schedules.
You can also ask at the tourist office in Lauterbrunnen or Wengen, etc., once you are there. What you need to be concerned about is whether there is significant walking , even on a loop with transport, especially with altitude change. The loop that Rockoyster suggested has a few hundred meters of fairly level walking from one end of Mürren to the other. Look at the map linked below.
map.search.ch/?pos=640360,162144&z=32 &poi=bergbahn,halteste lle,zug
That map will show various transport options. Zoom in far enough and it shows the rail lines, etc. Under Points of Interest/ Traffic, you can turn on the station stops. It is really good for that, because mousing over an icon for a station gives a bit of information about the next trains/buses/cable cars to/from that station. In one way It is not so good, because it does not give numbers for altitudes, desirable for walking. Zoom way in and you can even see trails.
There is another excellent map, but it has a tremendous amount of information. It is a contour map, or topographic map. It is absolutely the best map but has has a whole lot of detail, and the option to turn features on and off. I use it when I get into fine detail for walking. You don't need it for finding trains/ cableways, etc., but you can use it for that.
map.geo.admin.ch/?topic=ech&lang=en&bgLa yer=ch.swisstopo.pixel karte-farbe&layers=ch.bav.ha ltestellen-oev,ch.swisstopo.swiss tlm3d-wanderwege&X=161223.69 &Y=635049.58&zoom=6&la yers_visibility=true,f alse
In the version that I have linked to, I have set it to show transport stops. Turn off the transport stops, and you can easily read altitude numbers ( in meters) . If they are turned on, you can click on the icons for schedule info.
You can see that the train stop for the small train arriving in Mürrren from Grütschalp is at 1638 meters . (Trains are the dashed black and white double lines.)
About 500 or 600 meters away is the cable car station for connections to Gimmelwald, Stechelberg ( or upward to Schilthorn). Zoom in far enough and you can see that it is also at 1638 meters altitude. The walk between the two is almost completely level.
If that is too much distance, then come up via the bus from Lauterbrunnen to Stechelberg and get on the cableways there.
This comment concerns me:
<<"Oh, and yes my dad can walk short distances. He just needs to rest after 10-15 minutes. I also need to find out if he's ok with being at high altitudes or whether he's scared of heights! :-/">>
Although I do not notice it very much at 1600 meters above sea level, the air is "thinner" ( less oxygen concentration) than at sea level, and exertion at the height can be more tiring that at sea level, or at the level of most cities in Switzerland ( about 400 meters).
If I am at 2300 meters (Männlichen) and climb 100 meters to Männlichen Gipfel ( the small peak above the lift station) I have to pause frequently to catch my breath. And, I tire more easily. At that altitude, I definitely notice the lesser oxygen concentration if I do any kind of exercise.
If your father's difficulties with walking are related to breathing problems or to his heart being weak so that he does not get enough oxygen carried throughout his body, he may find his condition to be worse at higher altitudes. I mention it without knowing details, purely for your information.
Loops can involve the cable cars from Grindelwald Grund and also from Wengen to Männlichen. They can involve the cograil train from Lauterbrunnen to Wengen to Kleine Scheidegg to Alpiglen to Grindelwald . Regular trains run on the valley floors from Lauterbrunnen or from Grindelwald to Zweilütschinen, and thence to Interlaken Ost.
Hope that helps. Let us know.