The best resources are other writers! It helps to hear about opportunities and events through word of mouth. But the Internet is the next best thing.
A growing list of resources. I have looked at many of them for intel, but not all. As always, I recommend due diligence. Information may change.
The Masters Review (find more opps in their email newsletter)
Clarion West Writers Workshop (Early Deadline February 10, Regular Deadline March 1)
Odyssey Writing Workshop (Early Application Deadline January 31, Regular Application Deadline April 7)
Pacific Coast Children’s Writers Workshop (Applications March-June)
Viable Paradise (Applications January 1-June 15)
VONA/Voices (Applications January 1-March 15)