I'm with OM. This forum works really well for a lot of things...

Current trail conditions? Ask, and often ye shall receive.

I spend 30 minutes a month on Facebook---enough to find out that I've missed a few things that are important, and s thousand things that are not important.

Specific through hikes (PCT, AT, etc) have on-line communities that are more focused on current conditions. For hikes in various parks or mountain ranges, there are communities that focus on the Sierra, for example.

But this place is as good as any---and we have experts from a lot of the major hiking areas in the US.
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Check our our website: http://www.backpackthesierra.com/

Or just read a good mystery novel set in the Sierra; https://www.amazon.com/Danger-Falling-Rocks-Paul-Wagner/dp/0984884963