My post is similar to this one : Cross country ski trails that are used for hiking in the summer
Although, I want to make sure the trails appear on OpenSkiMap, can you enlighten me on how to tag properly? Thank you.
So far, I have:
foot=yes
highway=footway
lit=no
name=Montée - Mont Vallières-de-Saint-Réal
piste:grooming=backcountry
piste:type=skitour
I’m confused as to what is the feature type to best represent this. Thanks!
You should also specify piste:difficulty – and the name better be put into piste:name, unless the hiking path is called like that.
And then, if this is in back country, highway=path a better fit than footway? And if you happen to know, the surface of the path (ground e.g.) and the hiking difficulty, sac_scale.
footway was what what already put in there. If you tell me highway=path is better, I’ll do that!
There is no definite consensus, if in your area all hiking paths mapped as footways, no need to start changing that. There is consensus though, that adding a value for surface always good, even unpaved considered a start for further refinement.
PS: This in Canada, makes me curious, have you ever heard of sac_scale before?
Just saw it in one of the pathways. No I haven’t heard.
Lots of good answers here already. The tagging for a backcountry ski piste does not conflict with the tagging for a hiking trail so you can put both tags on the same way.
With regard to path vs footway, that convention seems to vary depending on where you are in the world. But as a person who renders maps for hiking, please put at least a surface on the way. Paved/unpaved at the minimum. Trail visibility and SAC scale are also very helpful. The issue is that since trail tagging does not have a single agreed highway=* value the renderers have to look at those secondary tags to determine if this is a smooth walkway suitable for pushing a baby stroller or a way that requires good footwear and maybe hiking poles, etc. I wrote up the difficulties I ran into trying to figure out how to identify hiking trails in OSM about 5 years ago and the situation has not changed much.
The OP asking how to map a skitour, I sincerely hope they had enough snow not to know how to map the underlying summer trail surface 
I am hoping that if the OP knows the area well enough to know there is a hiking trail covered with snow that they also know the trail surface. 
Unfortunately, the winter season where I am hasn’t been good. Only one week of decent skiing. 
I also learned of the sac scale from openstreetmap. And I live in a neighbour country of where the SAC resides.
BTW: Still more curious, how are hiking trails like the one pictured here https://www.watson.ch/imgdb/18ab/Qx,A,0,0,2000,1335,833,556,333,222/1356322392072686 mapped in Canada? [here to where this deeplink from]
Any mountaineers please correct me if I’m wrong, but I think there isn’t any climbing like this in Quebec outside of climbing gyms. The highest point in Quebec is 1652 m above sea level and it’s located at least two Switzerland-lengths away from any notable population centres.
Well, I was just curious, does sac_scale (the canonical key used in openstreetmap to map hiking difficulty) fly in Canada. My take away from the messages posted here: No, it does not.
You may have heard that Canada’s quite big 
An editor mapping xc skiing in Quebec might well not know how mountain hiking paths in the Rockies are tagged because they’re 4000 km away.
AllTrails says of the trail in this topic:
Généralement considéré comme un parcours difficile … le sentier devient constitué de beaucoup de roches à gravir et à descendre.
PS: Obviously, the climbing rocks section on the other side of the summit of the ski-tour to Mont Vallières-de-Saint-Réal, but certainly not 4000 km away.