Puerto Río Tranquilo, CL

Days 2-5

One good thing about me occasionally riding Rett’s bike up steep hills is that it gives me a chance to notice any potential mechanical issues that might escape her detection. For the last few days, I’ve felt a sort of vibration, or “buzzing” coming through her pedals and into my feet when pedaling. With some time off here, I was able to remove the chain and crank and verify that the bearing in the non-drive side bottom bracket is grinding and has play in it. Given the timing, I have to wonder if the cause was the same silty water that infiltrated and gummed up my freehub a couple weeks ago. Though unlike the 8-month-old freehub, her bottom bracket has 20,000 miles on it (or, by rough calculation, some 10 million rotations!), so maybe it was just normal time and wear.

Unfortunately, Shimano Hollowtech II bottom brackets are even less-serviceable than my barely-serviceable freehub was (they literally have “Do Not Disassemble” printed on them). So replacement is the only reasonable option, which not only requires a new bottom bracket, but a specialized wrench for removal/installation that I don’t have. Surprisingly this tiny town of Puerto Rio Tranquilo contains a sort-of bike shop in its 3-by-4 block grid of buildings. So I rolled over there one evening, and while the mechanic wasn’t there, his assistant helpfully called him up just to confirm that they didn’t have any bottom brackets available. Shoot.

The next option was getting in touch with Viaje en Bici, a bike shop in far-away Concepcion, but well-known for helping touring cyclists throughout Chile by shipping parts. I asked about the possibility of them sending a bottom bracket ahead to Cochrane (the next town we would reach), and not only did they immediately respond, they also took the initiative to contact the owner of the similar barely-a-bike-shop there to verify that they had the wrench necessary to install it. Amazing! I have no idea how long the bottom bracket would continue working until total failure (maybe a week, maybe a year), but since it has already been in this “grinding” state for nearly a week, it seemed likely it would survive three more days of riding to Cochrane.

With that (partially) settled, it was time for some tourism, a paid-for non-bike excursion that I don’t think we’ve done since we were in the Sacred Valley of Peru. We knew the Marble Caves were a popular attraction, but it was still discombobulating on the day we rolled into town when multiple touts on the street approached us to ask if we were looking for a Marble Caves tour! They were in front of the street running towards the water that is lined on both sides with the small buildings of competing tour operators. And then of course this was the destination of many of the buses that had passed us on the road. In short, it was a level of tourism infrastructure more-developed than anything we’ve seen anywhere in all of Chile, so to see it in this tiny little town in one of the most-remote parts of the country was quite a shock.

The “caves” are only accessible by water, and surely the coolest way to see them is by kayak, but that sounded like a bit too much complexity to add to our lives, so we just went with a normal boat tour. The weather pattern on the Carretera Austral for us has alternated between several days of clear weather, followed by several days of cloudy and rainy weather. So far, our planning (and a bit of luck) has allowed us to align our riding with the clear part of the cycle, and our breaks with the rainy part, but that meant we had to wait a few days during our “time off” for the sky to clear enough to light up the lake’s turquoise water and reflect it into the marble caves. When we finally went to book a trip (walking over to the kiosks and finding the place that Rett had sent an unresponded-to WhatsApp message), they still wanted to take us out then during the cloudy morning, but eventually we convinced them to put together a tour for the afternoon when the forecast showed the skies clearing. When we returned at 3pm with the sun brightly shining, the operator acceded with his smile: “yep, you were right!”

We set off with a family of six, leaving a couple of empty seats in the low-slung, open, fiberglass motorboat, similar to the “pangas” on which we visited the gray whales in Baja, Mexico. Our tour guide and captain spoke only in (Chilean) Spanish, so we didn’t understand much, but you could say we got the picture. We did the “full” tour, which meant that we first crossed the arm of General Carrera Lake toward Puerto Sanchez, and the group of islands that lie in front of it. The islands themselves were really unique, and it was just nice to be out on a boat ride on a lake. Thanks Rett!

Whether the mainland or an island, the shorelines all around this part of the lake have caves like this carved into them.
Once we got to a point where the shore was nothing but caves, our captain did not hesitate to just pilot our boat right into them.
I was surprised how little warning they gave about smashing your head on a rock as we motored into passageways barely larger than the boat itself, but no one ever took a smack.
Everywhere the marble has this surface pattern that looks like it was chipped away with stone tools.
Inside a marble cave.
This part of the island had no caves, just a towering cliff, something that would be worth a boat trip in its own right.
I don’t remember if we went into this cave or not, but we certainly went in several like it (in all but one case we entered forward, and backed out).
Somehow the clouds high above the cliff know to echo the shape of the caves.
Once you see the 15th cave, you’d think you’d start getting bored, but there is a surprising amount of variety across them, to the point where I actually wanted to explore more than the half-dozen that we were able to do a close inspection of.
Like, here’s a black cave all of a sudden, with these orange scars slashed through it! (and at the left is a “pillar” that has just recently been worn thin enough to break through.)
Shit, I think we’ve accidentally sailed right up into a sleeping black dragon!
It seems the land/islands were formed with the rock aligned at various different angles, so that’s what lends a lot of the variety once the water started carving it along its natural fault lines.
We’re inside a marble cave!
The angle between us, the sun, and water had to be just right to get this maximum color-pop, but this is at least as bright as it looked to the naked eye.
In other waters, spaces like this would seem to be havens for wildlife, but there wasn’t much to see in this glacial lake.
Here it looks like the stone is imitating a breaking wave.
“The Dog’s Head”, one of the features listed on the tour posters, would have gone totally unnoticed had our captain not positioned the boat to approach from this precise angle.
The left end of this section featured “The Elephant”, again better seen from an earlier angle.
Not a reflection, but the eroded marble continuing below the waterline.
This was one section where it was possible to take the boat into one entrance to the caves, and drive out another.
A car with really bright headlights must be driving over the water behind this standalone island, “The Marble Cathedral”.
Kayaking would have definitely been really cool, though I feel like our speed would have limited us to a deeper focus on a handful of spots, versus the broad overview and huge variety that we saw with a motor. I also felt bad because we were exactly “those assholes in the motorboat” that we would have been annoyed with if we were in the kayaks (though our captain did a pretty good job of being respectful).
We finished with “The Marble Chapel”, an iconic image along the Carretera Austral that we have seen in posters and even on trucks.
We’re in a boat!
“The Marble Chapel” looks quite different from the opposite angle, but pretty awesome here too.
As a final flourish before heading home, our captain spun us into two tight, quick laps around the chapel.

For most of the tour we moved at slow-to-moderate speed winding from shore to shore, but once we had seen everything, our captain made a beeline for home, cranking up the speed and crossing an area with much larger waves. This caused the boat to temporarily fly, and then smack down onto the concrete-hard water, eliciting yelps and laughs of excitement from Rett and a couple of the other women on-board, and reminding me exactly of those trips in Baja (though here we had chairs with a bit of padding, vs. Baja’s wooden bench seats). Clearly it was intended to be part of the entertainment, and I definitely feel like we got our money’s worth (~US$70 for both of us).

There were still enough clouds that the lighting wasn’t perfect for our tour, but it was the best window during our four days off, and it also allowed insane contrasts like this.

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