Employment Law Questions? Ask an Employment Lawyer.
In short, no, the non-compete is not (or should not be) valid for two reasons: (1) They did not provide consideration to you at the time you signed the non-compete; and (2) it is not limited in geographic scope (in this instance, it is far too broad).
As such, based on what you have shared with me, you can take your skill set and work with another similarly situated company. However, I would caution against direct competition, if that is possible. Even frivolous law suits are expensive to defend. Moreover, don't get into a situation in which you are using knowledge or client lists from your previous employer (they can sue for tortuous interference with business, etc.).
Otherwise, you are good to go here.
By the way, I am a licensed attorney with over a decade of practice experience in the employment law area.
Let me know if you have other questions and please also rate my answer positively (THREE or MORE STARS).
Just checking to see if you have any additional questions. I want to make sure you are as comfortable as possible as you move forward. Thanks!