Geoadmin VS uMap

https://map.geo.admin.ch/?lang=en&topic=ech&bgLayer=ch.swiss...

In general, map.geo.admin.ch is great for planning hikes - you can choose the hiking trails overlay (as well as "closures hiking trails" - type in the search bar - to check all is OK. Clicking the little settings gear icon next to the map name in the sidebar gives you info on what it's showing), and use the "draw & measure on map" tool to see how long a given route would be.

Some useful sites to aid self-guided exploring: sbb.ch, map.geo.admin.ch .

Use a proper map, https://map.geo.admin.ch , and turn on the layer for public transport stops.

Online Swiss maps, including trails: https://map.geo.admin.ch/

Depending on how easy you find it to get around, and what you mean by "all the cool mountains", you could go up to Crans Montana by train and funicular via Sierre, maybe about 3h travel time each way (but very pretty for the most part). It's at about 1500m - not high enough to cause any noticeable problems for people with normal lung function, but obviously I can't speak for you - and has nice views over several of the high Valais peaks on the south side of the Rhone valley. If you are up to gentle strolls then the bisses of Valais could be right up your street, they are flat paths along old irrigation channels that traverse the hillsides at around 1500m, usually with public transport access, and often have lovely views. Those on the north side of the Rhone valley have good views of the high mountains on its south side. You can also stick lower down in the vineyards, though often the paths there go up and down quite steeply so a bit of route planning would be needed (map.geo.admin.ch is an awesome website for that I find, if you can interpret topographic maps)

Maybe check out the canonical page instead: https://map.geo.admin.ch

View were given showing the 'cadastre' (outside mesurement) and airplane view with the original 'development plan' (https://map.geo.admin.ch/)

map.geo.admin.ch

https://map.geo.admin.ch This is the national map database. You can view all hiking routes, bus stops, cable cars and anything else you can imagine. And you can also plan your hikes, save and export them.

Umap?

If that's not feasible and what you're doing isn't secret then perhaps something like uMap might work? This allows you to add overlays for the things you want to highlight and has a few different styles of basemap that tone down some of the clutter of the default "default" style. It also lets you pull (small amounts) of data into it via Overpass e.g. pre-mapped fishing spots or toilets. This can then be shared as a link or embedded in a site.

Having an OSM basemap overlaid with points is easily possible with uMap, for example https://umap.openstreetmap.fr/

Have you used the OpenStreetMap ecosystem of ID/JSOM or maybe uMap (https://wiki.openstreetmap.org/wiki/UMap) if you need the data separated from OSM?

Not an App, but did you take a look at https://wiki.openstreetmap.org/wiki/UMap? With it you can make personal maps with OSM base layers.

Depends what you mean by private. For something shareable on the web you might want to try one of the uMap instances, not sure if you can keep them secret though. If you decide to use them I recommend you log into an OSM account first as otherwise it is very easy to lose the edit link.

For public display one of the uMap instances is probably easiest. It should allow you to import your previously exported points and also allows line and area attributes. The share link included embed code for a website. The instance linked by /u/beardy64 is probably the most popular, but there are several listed at my previous link. I would recommend you log in before creating the maps as without a login you have to carefully keep track of you edit URL's if you might ever want to update things.

- https://github.com/umap-project/umap/blob/master/docs/install.md

If someone is looking for an open-source webinterface for OpenStreetMap that offers a bit more eye candy, I recommend taking a look at Qwant Maps. Another useful OSM tool is uMap (source).