Thanks Andrew. I'm somewhat locked into my routes but I am definitely working in good efforts on hills when I do get to run hilly routes. Also, my strides are done on railroad grades and I do try to mix up doing them on uphill and downhill stretches of the grade. What I'm also doing is mixing in once a week workouts. Nothing difficult, this week 10×1 minute repeats with 1 minute recoveries. Just building into the summer slowly but surely.