A wise person once told me "Focus on distance, speed or hills".
If you want to increase your distance, you shouldn't try to shave a minute off your pace. If you want to run faster, you shouldn't try to do it the first time you run hills.
And if you want to increase your distance, you shouldn't do it the first time you've run hills in 2 months. I didn't follow this sage advice.
I planned to run a 10K around the lake. The hilly lake. After not running for 2 months. After run walking a 1/2 marathon, which I knew I shouldn't have attempted. After a week of recovery. (AKA not running for a week)
I was able to run most of the lake. I walked most of the uphills, though. Only did one lap of the lake, then went home and ran 2 more miles around my 'hood and called it good.
I just need to rinse and repeat.