Here were the factors:
• 237 miles round-trip of gravel and unmaintained dirt bisecting two wilderness areas
• No direct experience with this route
• Reports rating the route range from easy to difficult and technical
• 80 percent chance of rain throughout the corridor the day before we ride in, meaning...
Streams running across the road?
Mud holes of unknown depth and uncertain bottoms?
Slick surfaces?
Washouts?
• A 530-lb. 1000 V-Strom mule
• 80 highway/20 off-road Pirelli Scorpion Trail tires
• A heavy load of gear (camping, food, water, etc.)
• A passenger (of average weight!)
• A driver with some experience on improved gravel, almost zero with true "trail" conditions
• Driver nearing 60 and not in the best physical condition, passenger is 64
Decision: borrow a friend's Suzuki ATV quad
I decided it would be preferable to regret not taking the bike, rather than regret taking it. Too much was unknown.
Was the driver (me) cowardly or prudent? My decision - and actions - would affect two of us.
At first, I was glad I had decided against doing it two-up; then, as surface conditions deteriorated, I was glad I had decided not to do it on the V-Strom with those tires; finally, I concluded if I ever did try it on a bike, it would be a 250 or 400 dual-sport with aggressive off-road tires. The previous day's heavy rains were not a factor.
I had zero experience running an ATV over any distances on chewed up roads, but I handled it, two-up and loaded, without incident, not even a close call. It made the adventure a wonderful experience, instead of one fraught with difficulty, anxiety and remorse, though I was plenty beat at 80 miles.
Can it be done on the biggest, fully loaded adventure bikes? Apparently. I saw plenty of them doing it, and piloted by some folks well into their 60s, maybe approaching 70. My 31-year-old pal on his KTM 1190 Adventure had no trouble. Experience and skill is what matters.
Nevertheless, the adventure tour was an awesome experience of the highest caliber.
Stunningly beautiful country and vistas, though much of the wilderness timberlands are burned over. The Bitterroot Mountains are a damned big, rugged range. The Magruder Road has many long and steep ascents and descents that may be washed out to a varying degree leaving a "chunky" rocky surface - billiard ball to soccer ball. In one ascent, you climb, relentlessly, from 3,700 feet to 8,200 feet over 12 miles of challenging (by my standards) road.
Would I recommend Forum members try this or something like it? Absolutely! Honestly assess your experience and skills, then make a good choice, even if that is your 4x4 pickup or SUV (with good, stout off-road rubber). An ATV or UTV (side-by-side) are perfect tools for this job, especially given their hauling capacity, stability and economy (25 MPG). Consider a smaller, lighter dual-sport or, if your are "competent" or "expert" with the big ADV machines, have at it (again, I'd recommend at least 50/50 treads).
It was an incredible three-day ride though enchanting country.
Now our small group is looking at another run through primitive country, this time the Lolo Wagon Road. We'll start watching the weather...
I am writing this adventure up in detail for publication elsewhere (2016) and can send anyone the long version with pics if they are interested. Just PM...
Now this weekend we're off to the Beartooth Highway/Chief Joseph Scenic Byway and the passes and alpine riding of the Big Horns...all on known pavement on an FJR!