Since I first got a Honda Element in 2004, I've been a big fan of ProClipUSA. They make clean fixed mounts that slide into the creases and edges of dashboards and air vents. They are expensive, you have to pay around $30 for a mount and then another $30 and up for something that fits your exact phone. Having a fixed mount is a safety issue for me, because I'm never fumbling for my phone if I need to change a song or answer a call, instead putting music a quick finger tap away right next to the steering wheel where it never moves.
Before my truck arrived, I looked at interior shots of both the Ridgeline and the Honda Pilot and saw they shared a nearly identical dashboard, so even though ProClip earlier this month didn't offer a Ridgeline mount, I bought the Pilot version and hoped for the best.
Thankfully, everything fits perfectly, my iPhone 6s+ is as close to the steering wheel as it can be without causing any interference issues. Some quick shots of the installation are below.