What time were you at High park? I took a few laps around the short course on my utility bike. Blasting through the puddles was fun, It's got wide fenders so I pretty much didn't get wet.
Today was an exception crowds wise I think, being a nice warm sunday and all. During the week it's quieter and although the short course (around the ball fields and pool) can get boring pretty quick there's some good climbs on the Eastermost side of the park and the loop around the pond (Up ellis and then across bloor) is an awesome loop.