Depends on your bike and how precious you are / fine tuned it is.
AVOID pressure washer, just hose - may be worth some surface degreaser to breakdown grease traps (jockey wheeks, derailleurs, chain) that have now clung onto sand, then re-lube afterwards.
If youre on a high end / precision bike or you are finikity, then good excuse for a strip and rebuild and clean everything out.
I'd suggest a thorough chain clean!