Open Bar · All Night
The Cocktail Menu
Five signature lake-house cocktails — from Lake House Lemonade to the legendary Mamajuanas.
View the menu →
Lake Rosseau · Muskoka
We present to you Old Post's Annual Beach Party — one unforgettable weekend on the lake. Tickets are limited; grab yours before they're gone.
Old Post's Annual Beach Party
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The annual tradition
Every year we take over the Old Post boathouse on Lake Rosseau for one unforgettable night — open bar, live music, a midnight swim, and the best crowd in Muskoka. Space is strictly limited, so lock in your ticket before it's gone.
Plan Your Night
Nathan Grabke's Annual Cottage Party on Lake Rosseau — here's the bar, your ride, and how the night unfolds. Tap any card for the details.
Five signature lake-house cocktails — from Lake House Lemonade to the legendary Mamajuanas.
View the menu →General admission is $50 per person. Add the limo package for door-to-dock chauffeur service — message us for limo pricing.
Book your ride →From golden-hour dock drinks to the midnight bonfire — the full schedule for the evening.
See the schedule →Gallery
Scenes from Lake Rosseau and the Old Post cottage — the place it all goes down.
Location
26B Old Post Road, Seguin, ON · on the shores of Lake Rosseau, Muskoka.
Book Your Reservation
Spots are capped at 60 and they go fast. Send us your details and we'll get back to you to lock in your ticket to the best night of your life on Lake Rosseau.