North Mountain Tower Road, which grants access to popular trails on North Mountain and Shaw Butte, will be closed from now until fall 2018.
Construction will restrict vehicle access to the popular spots May 9-16.
The reservoir, which is only 22 percent full, is shuttered for the foreseeable future.
Parts of the Tonto and Coconino National Forests close today due to extreme fire risk.
Officials will consider drought and wind conditions when they decide which zones to close.