Harrison Hot Springs is the closest hot spring to Vancouver, BC. If you want the full spring experience it appears that you have to book a room as the hotels do not allow day use. Thankfully there is the public hot spring fed pool. The water is definitely spring water, but seeing that it’s a pool the water is kept at around 38c. When I went in it felt much cooler than that. Besides the pool there’s a large clean changing and shower room—that’s it. Bring your own bathing suits, towels, and soaps. Also, bring your own pool toys as they are very much allowed.