Jason,
You ask a difficult question that really takes years to get down.
Read articles on how to read a topo map and get a good topographic map.
You will be able to tell a good bit about the creek from it.
Ex:
Next read and learn about geological features and how the effect trout. Ex: silca substrates bad - limestone good.
Next, search online and get a good geological map of an area you are interested in. Cross reference it with your topographic map and you can really tell a lot about a watershed.
Finally, cross reference all of this with the PFBC lists.
If you find a "sister" stream not on the list to another watershed that is on the list, in the same watershed with the same geology and topography (or not), it likely holds trout.
Like wildtrouter said, pick a bunch of streams in a close proximity, do your research then go explore. I recommend trying low (mouth) and high (headwaters) on the same watershed. Just because one is a strike out doesn't mean the whole watershed is bad.
Headwaters empty but it has tribs below, could be fish lower.
Lower watershed barren, there could be fish in the headwaters.
You just never know, it's half the fun.
If you lived closer id invite you over for a beer and chat and go into more detail but you basically got my method above.
Nothing replaces time and experience but you can shorten your curve.
Study hard, you will find uncharted waters.
Good luck