Howe Sound Crest trail fits the bill for around Squamish. It's very popular (although it's no West highland way), so maybe not what you're after. Juan de Fuca is probably all booked out, but worth looking into. Similarly the North Coast trail is worth a good look. I've done none of these, but will do the HSCT in about a month so can let you know how it goes.
Be aware that there might be fires all over the show inland at that time of year. You may be lucky to even drive through some of the highways, e.g. the Coquihalla or the Duffy might be all aflame and you can't drive past that way - let alone go hiking.