Wack-Traveller
Parking for the site is the last pull out before the Foley Lake turn off from Chilliwack Lake Rd. From there it is a short walk (10 mins) down to the river. The largest cave is locked and access is run by The Fraser Valley Caving Society (?)(good luck getting any cooperation from them), but there are several other smaller caves worth exploring, including a chimney that starts at the rivers edge and winds its way up the hill. There is also the rather warm 'cave of arachnids'; I don't know if they reside there year round, but during one winter excursion, when we came upon it, it was quite full. The caves, for the most part, are not obvious; it does take some exploring to find some of them. It's a great day trip. Camping is possible, but there are no amenities (at least not the last time I went).