Why do i have a cramp? I think Ive been getting a cramp in my right quad. I assume its a cramp, but ive never had one before. 

I bike 10 miles per day 5 days per week. I always ride the same way (to and from work). On one particular stretch (comm ave in boston) i usually try go about 25mph the whole way. This is where i get the cramp. 

It started happening last week and just assumed it was because of the colder weather. Is there anything i can to prevent it from happening?
There are a number of reasons you could be cramping - if that is, in fact, what it is.


You are not properly warmed up before exerting yourself
You are exceeding your limit of fitness
You are not properly hydrated
You have not eaten enough food to fuel your ride


Without additional information it's really hard to diagnose something like this, but those are some common causes of cramping during a ride or any athletic activity. You may also look at your technique to see if you are favoring one side over another or have a setup that is not ideal.