Hello. My wife and I have heard about the Tucson Loop but have never been on it. We are planning to do a day trip from Phoenix to ride a portion of it, hopefully 50miles of cycling. We were thinking to do an east-side section like Diamond St Loop that's farther away from the interstate. We'd ideally like to minimize time on surface streets while on the bikes and we are not opposed to paying for secure parking. Any recommendations on where to safely/securely park a vehicle for 3-4 hours while we ride?

Thanks for any suggestions.