This is along the route I walk the dog and that takes us on an easy walk on the Agua Fria River.
You can park near the City of El Mirage cache and head east or park near the Finnegan Grey cache and head south.
No matter how you approach it, there is an opportunity to get four caches in a little less than a mile through some interesting river bed.
The cache is a regular so I started it with a travel bug.