Sportvereniging Friesland organizes the Hoeve aan den Wegloop at Camping Hoeve aan den Weg. There are several running distances to choose from, so you can pick what suits you best. Prices are different for early and late sign-ups, and also for members and non-members. There are toilets and showers available, so you don’t have to worry about that.
The race is straightforward—just show up, run, and enjoy. No fancy stuff, just good old running. If you’re in the area, it’s worth checking out.