I ran Monday anyway (probably not wise), and after about 6.5 miles, it was very sore. It was sore for the rest of the day and is still tender today.
I had to be at work at 7:15 this morning, so I woke up at 5:00 hoping to get an easy run in. My leg was still sore, so I thought better of it. So I went to the 5:15 AM spinning class at the gym. That was a pretty good cardio workout. It did nothing for my endurance, though. I say that because I was sweating like mad during the class and was struggling at the end of each interval. However, 5 minutes after the class, it felt like I had done nothing. I liked the class, and I'll probably be back at least until my leg heals.
I feel like I'm going to have to spend the next 6 weeks strictly getting over this calf thing and building base for the training that starts in August.