Was reading your blog and was intrigued by colombia, how much of the road is dirt vs smoothly paved?
Depends on where you want to go. Most of the roads between the main cities are paved, but if you wanted to visit some of the smaller towns, then these would only be accessible by a gravel road. It's changing quickly though, the world is getting more and more paved. I remember the gnarliest road we did in Colombia was actually in the process of getting paved, we were riding past big construction vehicles back in 2013.
At that time, there were huge sections of the country to the east that were controlled by FARC guerillas. They eventually disarmed and became a political party in 2017, so today there would be lots more of the country to explore by motorcycle compared to when we were there.
One place we debated about visiting was Rainbow River. But we never did because it was in FARC-controlled territory at the time:
Despite that, we spent five months in Colombia, it was one of our favorite countries to visit.
I take it there is a reason they take adv bikes with ground clearance and knobbies instead of goldwings for rtw type stuff?
Yeah. Marketing.
Most of the populated world is paved, if not by asphalt then by hard-packed gravel. You don't need a R1200GS to ride gravel. In all of the broken roads in developing countries we've ridden through, the locals are all on 125cc Chinese motorcycles on street suspension and tires. And they're carrying a family of four on them.
I've read blogs of guys taking their low-clearance Harley Davidsons with street tires on RTW trips. Any road that a horse and cart can travel on is doable by any kind of motorcycle. Just that some do it more comfortably than others.
The theory is that what you're gaining by getting a bike with longer suspension travel, higher ground clearance, upright seating position, grippy tires, armor in all the right places is the ability to explore all the nooks and crannies and areas past the end-points of civilization. Where the gravel roads end and the areas that are accessible by horse+cart become only accessible by horse. And you have to make a real effort to find roads like these, because they won't be on any map.
The reality and the problem with the adventure bike market today is that it delivers all of the above at the expense of weight. Outfitted with all of the off-road bells and whistles, can these bikes go on roads accessible by horse? Nope. Too heavy now.
My opinion is that 95% of all adventure travel is doable on almost any kind of motorcycle. You can take a Harley up the Dalton Highway in Alaska and the Carretera Austral in Chile. But the street suspension will have you bouncing all over the place, the smooth tires will having you sliding in the mud and the feet-forward position won't allow you to move your body weight so you're making the best use of traction and balance. The ADV bike just makes it more comfortable to do it on.
Because of the bikes we've got right now, I've been transitioning from watching shows like Long Way Round/Down/Up/Sideways/etc to shows like these:
Roads not on maps. Roads where you probably couldn't take a Harley through. Or a R1200GS, for that matter...