It certainly looks like Sidalcea hendersonii. I grew one in my garden for years but it died in the heat dome last year. E-Flora BC says, "Henderson's checker-mallow is a native plant species found in wet meadows, estuaries and tidal flats in southwestern British Columbia." It is somewhat at risk so a nice plant to find on your walkabout. E-Flora BC Atlas Page
The few times I've seen what is presumably this species it has always been a tiny population in a marshlike situation poking up from among grasses - just like in your pictures.
