8 Mile Sweaty Tempo Run

8 miles up at the lake, warm and muggy, about 85F with a 69F dew point, though it would have in theory been cooler at the end. Overcast, so at least the sun wasn't beating down, but there was not much wind. Was a sweaty mess by the end. 1 mile warm up at 10:12 pace, then splits of 8:59, 9:03, 9:34, 9:42, 9:38, 9:48 and a cool down mile of 10:23. I took a walk break every mile. Heart rate got over 170 a few times, and a started slowing down later in the run to keep it from getting any higher. Going to need to drag myself out of bed and run in the morning, it's just going to get worse as the summer goes on.