I'm in Colorado and check flows daily. Historically, flows peak in mid June and generally are good to go by July 4 or so.
Here's the Colorado flows site: [url=http://www.dwr.state.co.us/Hydrology/flow_search.asp:85f0c]http://www.dwr.state.co.us/Hydrology/flow_search.asp[/url:85f0c]
Search the stream of your choice. Then Select, at the top, "Recent Dailies" to be able to check the historical flows over the past up to 730 days.
Because of the precip levels in S CO, it's likely flows won't be clear and "right" til after July 4.
Also, check out duranglers.com and, among other things, ask them if the Vallecito Res area is ok now since it burned back in the 2002 fire year.