first: nih.gov where all good things start
next: page the OER home page about grants and funding
then: Funding, which gives you a search page. This is for both RFA’s (request for applications) and PAs (Program Announcements), both labeled ACTIVE (which means current). There is also a box on the results page to include expired, etc.
If you type in a kind of award like “K02” or “R01” you will get the current announcements pertaining to that mechanism. R01 is a long list. K02 is one results which is the parent K02.
These results also show the expiration date, as well as a link to related PA’s.
Go knock yourself out.