We haven't been to the little reservoir and public 'circular' trail since March... And the grass has really grown since! I went today with Lola, as the fact it was a gorgeous Sunday day would have meant that our park would be brimming with other people and dogs, and we had a blast. It was awful to walk to (twenty minutes or so hard slog up an incredibly steep hill), but once we were there that all changed.
Lola also demonstrated the first 'real' terrier instinct I've ever seen in her (other than attacking toys and general prey drive) - for about fifteen minutes, she was leaping through the grass, bouncing around and sniffing and clearly trying to pinpoint what she had heard/smelled. In the following video, at about 1:23 to 1:30 you can quite clearly hear a squeaking - so I'm not sure if she could smell mice or rats or something. She didn't manage to get anything, but I think she enjoyed her hunting time. It made a change from the usual fetch routine at the park!