2gypsies wrote:
Also, for Zion, don't put all your plans into doing the Narrows river walk. July/August is monsoon season and if it rains, that hike will be closed. Serious flooding can and has occurred.
It does indeed flash flood, as there was one the night before my hike down the Narrows in 2011. CFS spiked well over 250 (they close it to hiking at 150). But then 2011 was a record high flow, it was at 100 CFS for the hike, where normal is 30-50.
If you still plan on a side trip to Zion/Bryce, setup plans for both, and then look at the weather as you approach. If it looks iffy for the Narrows, do just Bryce instead. But if the weather is favorable, do the Narrows, its well worth the trouble.
We used this
Site to monitor the flow on the Virgin river. Right now it looks ideal, almost a bit dry at 30 CFS, was still well above 100 in 2011.