Overview
What it is
Ainsworth Hot Springs is a developed resort experience on Kootenay Lake, known for its horseshoe-shaped cave pool built into the mountainside. Unlike a typical outdoor soaking pool, the cave adds a warm, steamy tunnel feel that you either love or skip entirely.
Verified water temperatures
The resort publishes pool temperatures: warm mineral water enters their system at about 47°C (117°F) before being cooled to an average of about 42°C (108°F) for the cave pool and about 35°C (96°F) for the main lounging pool. They also note chlorine is added as required by regional health guidelines.
What to expect
This is a managed facility with day-use soaking plus lodging and food options on site. You are trading wilderness for comfort and consistency.
Location & Access
Where it is
Ainsworth Hot Springs Resort is on Highway 31 along Kootenay Lake, between Kaslo and Balfour. You drive to the property and walk a short distance to the pools, with no hiking required.
Road and timing
The highway is scenic but can be slow in winter storms, and the lakeshore stretch is not the place to rush. Build in buffer time, especially if you are connecting to a ferry or driving after dark.
What to bring
Bring swimwear, a towel, and sandals with grip for wet decks. If you plan to use the cave, consider whether you are comfortable in warm, humid, enclosed spaces. In winter, pack warm layers for the short transition between buildings.
Suitability & Accessibility
Best for
Ainsworth works well for travelers who want a resort-style hot springs day with a distinctive feature (the cave) and predictable water temperatures. It is also a good choice for mixed groups, because some people can soak in the main pool while others try the cave.
Families
This is generally workable for families, but the cave environment can feel intense for younger kids or anyone sensitive to steam and close quarters. If you are visiting with children, plan on shorter soaking rounds and lots of breaks.
Accessibility reality
The resort offers an accessible room, but that does not automatically mean the entire pool experience is barrier-free. Without a verified, current accessibility guide for pool entry and change areas, assume some pinch points and wet-surface challenges. If you need step-free pool entry, confirm directly before you go.
Safety & Etiquette
Heat, steam, and comfort
The cave pool is warmer than the main pool and can feel more intense because of humidity. Start with a short dip, then reassess. If you feel lightheaded, get out immediately and cool down.
Water care and etiquette
The resort notes chlorine is added to meet health requirements. Shower before soaking, keep food and drink away from the pools unless permitted, and do not bring glass onto wet decks.
Shared-space basics
Move slowly on slick surfaces, keep voices down in the cave (sound carries), and avoid blocking entrances where people queue. If the cave feels crowded, skip it rather than forcing space.
FAQs
How hot is Ainsworth Hot Springs?
The resort states water enters at about 47°C (117°F), then is cooled to an average of about 42°C (108°F) for the cave pool and about 35°C (96°F) for the main pool.
Is the water treated?
Yes. The resort notes chlorine is added as required by regional health guidelines, and water is tested to maintain parameters.
Do I have to use the cave pool?
No. You can soak in the main lounging pool only. If you are sensitive to humidity or enclosed spaces, the cave may not be comfortable.
Is it a wilderness hot spring?
No. This is a managed resort facility with a bathhouse setting, not a natural creek soak.