You’re right. This is Cepaea nemoralis, the Grovesnail. It is an introduced species, originally from Europe, now widespread in some areas of B.C. In the Vancouver – Fraser Valley region, it is very common. Incidentally, it turned up in Smithers last year for the first time. These ‘distant’ (perhaps occasional or single) snails may just be from strays coming in on plants – I don’t know for sure – or perhaps there are established populations in your area and mine?
Kind of cool…I have a random snail show up in my yard, and I found him…..
Have a good day all :)