Our April was terrible and that after a huge warmup for early March riding. We too had that stall in the riding season. How about changing something up on your bike or gear to help with generating interest? A new set of tires or something to spiff it up? Or, changing up routes. If you like to do the miles, are you setting out a rotation of favorite routes and getting tired/bored with them? You could drive to a different county and set an out-and-back, loop ride etc.

Dont be too strapped to your goal if it's just accumulating miles. I dont want to discourage it, maybe you need something a month out to train for like a group ride an hour or two drive (for sake of new territory) away?

And, how about a riding partner that can help you pass the miles?