first of all Valkenburg has a local beer:
They brew a lager but also an autumn beer (Bock) and a Dark Brown.
Then secondly there are regional beers from the province Limburg:
You can try Hertog Jan, they have many special beers for sale. You will surely have no probelms to find other beers, beers that you drink as a wine.
And last but not least, the Belgiums beers are still famous in holland and usually easy to find just across the border.
Try trappist, triple, Duvel (be careful with these) or the fruity beers, kriek (cherrybeer) or framboise (raspberry).
Also white beers are delicious refreshing in summer like Hoegaarden.
Have a look at the Belgium beers website:
You will have to prolong your holiday to try them all.
Unfortunately all the sites are in Dutch, and you have to be over 18 to enter some.
Hope this helps you, cheers, proost!