One place I've ridden that may be close to midway for us both is to park at the Reach 11 trailhead on Cave Creek Road, just north of the 101. You can ride north on Cave Creek Road, ride through Carefree, and continue east past Pima. I've always turned around where the road becomes one lane, which makes for about a 35 mile out/back. It's pretty much slight uphill going out, so the return is easier. We could extend it if we wanted by continuing east on Cave Creek towards Barlett, or just doing some exploring.
I also ride the Az. canal, which is traffic free. We could meet at Granada Park and ride west to 75th Av and back. Granada Park: 6505 N. 20th St., north of Maryland Ave., Phoenix. (take 20th St. south from Glendale Ave., or 18th St. north from Bethany Home Rd. I don't have a true mileage read on that, but I'd guess it's about also 35 miles or so.
Most of the rides I've done are out-backs, because there aren't alot of bike-friendly roads here on the west side. Many of our bike lanes go a mile or two and then stop. I'm still chicken when it comes to riding by myself without a bike lane. With company, your more visible and it's not so scary.
I don't know which is closer to you or which kind of ride you'd prefer. I'd like to start early, as in 5:30 or 6. If that seems to early for you, given a drive, I'd be willing to drive east your way. It's supposed to be our first 100 degree day on Saturday!
I'm going to bed, but I'll check tomorrow morning for your reply, and again around 6 when I get home. I'm psyched!
Jan.