I got out Saturday morning as the sun came up, 48*, 20.5 miles, and I about died. Not literally, but I massively bonked. Last year due to a couple of nagging medical issues, I only logged less than 700 miles in comparison to a seasonal average of near 2500 miles. The last of those rides before yesterday, were back in December @ 18 mi., and October @ 38 mi.
The last 3 miles were tough to keep moving and when I got back to my vehicle, I nearly passed out. Lucky for me I had a Clif Bar in the truck, it and 10 minutes later, I was able to drive away.

Moral to the story, don't push so hard until I get some base miles behind me.