The online newspapers can be sparse, with missing issues, years or just not even scanned at all. In the case of Boulder, for the GSL&P, you can find papers online up to about 1885 and from 1889-on, critical years for those following the line but missing even more interesting news bits. The only way to read those years will be to go to the library as there is no inter-library with UC Boulder. But regardless, we're lightyears beyond how it was. Since each community watched other communities closely, the papers reported on other communities, and needing to fill columns, lifted stories from other papers. You can get lucky and find news for a town or industry even when the local paper is missing. That said, a lot isn't reported...
Also, getting adept at the search on that site can be frustrating. It is wonderful not to have to scan pages and pages for keywords but sometimes they call things a depot or station or halt or whatever. Railroads can be abbreviated, spelled out, spelled incorrectly (to us), etc. The takeaway is to have a list of possible keywords and do multiple searches. And sometimes still scan the relevant pages as search won't always find a word due to the software garbling of print recognition. Have fun!
Dave Eggleston
Seattle, WA