expeditionswest - Thank you for testing a Patriot... I've been on all of those trails and I am very surprised that you made it home alive but even more surprise that a Patriot could make it through.
You are welcome. I have worked on several proof of performance projects with Jeep, including the recent Liberty crossing of the Rubicon.
As a crossover vehicle, the Patriot is actually quite exceptional, with the LR2 (Freelander) being the only equal, yet with a $15k premium
The key to all of these trails with a Patriot is to use the vehicles positive attributes to help navigate the obstacle. Maneuverability and stability allows the driver to select non-tradition lines to get through.
For the four-peaks and Crown King routes, the Patriot did very well. It is important to note that the trails were driven by an experienced driver, so the whole "Closed Course, Professional Driver" warning applies...
The FDI is a good vehicle for improved surfaces or the beach (sand). I would rate it's maximum capability with an average driver as a 2 rated trail, based on my five scale. The FDII just sneaks into the 2.5...
Essentially, they both do great on dirt roads that are maintained, like most forest service roads and desert two-tracks. Rocks begin to really test the platform. The are a blast in the sand, so small dunes and sand tracks and beaches are a perfect environment. It is always best to operate a vehicle at 80% or less of its capabilities, which allows for driver error and changes in weather, etc.
Here is my trail rating "guide"
Hope this helps
