Kesätekemisen keskus Roiske is a center for water activities and winter swimming on the bank of the Ounasjoki River in Saarenkylä, Rovaniemi.
With Johku, Roiske sells sauna and ice swimming tickets, private bookings of the wood-heated sauna raft and the riverside sauna, ice floating and ice fishing trips, the summer water park, cable waterskiing and wakeboarding, SUP board, kayak and boat rentals, and season passes and gift cards.