muscle pain

I've still been having muscle pain in my leg from yesterday's running...

I'll have a mountain biking tour in next Sunday, so I wish the pain will be gone..
Before I took a running yesterday, I had thought the muscle pain will be gone in 1 or 2 days, but now it seems the pain will not gone at all... I had completely forgotten that my ability of recovering physical(body) condition has got less and less than when I was young..!

My big worry at now is if I can recover my condition of my leg until the next
Sunday.

Please!!

This pic shows the route of the next tour..