Oastler Lake Provincial Park is a small recreational park in Seguin near Parry Sound and Georgian Bay, with seasonal camping, day use, lake views, canoe rentals, fishing, and nearby trail access. Ontario Parks lists the park at 31.56 hectares, established in 1967.
The park is compact, but its setting gives it a clear role: a waterfront camping base minutes from Parry Sound, Georgian Bay, and the Seguin Recreational Trail.
Ontario Parks highlights the Boyne River setting, panoramic views from waterfront campsites overlooking Oastler Lake, summer hiking and biking on the nearby Seguin Recreational Trail, great fishing for Rainbow Trout, pike, and bass, and canoe rentals on site.
That makes Oastler Lake a practical choice for campers who want the feel of a water-view site with nearby town and trail options. It can work for a relaxed weekend, a fishing-focused stay, or a Parry Sound area base.
Plan around car camping, waterfront campsites, canoeing, fishing, hiking and biking on the nearby Seguin Recreational Trail, lake photography, picnics, Parry Sound side trips, and Georgian Bay area exploring.
Ontario Parks notes that railway tracks near the park are used frequently, so noise-sensitive campers should consider that before choosing this park.
Ontario Parks lists Oastler Lake day use and camping from May 8 to October 13, 2026. Confirm campsite reservations, canoe rental availability, fishing rules, Seguin Trail conditions, railway proximity, alerts, facility hours, and park rules through the official Ontario Parks source before travelling.
