Jeremy McCreary
Bought it anyway
- Region
- USA
- City
- Carlsbad, CA
Yesterday's 18 mi ride with neighbor D started with...
Me: "Where to?"
D: "You pick."
Me: "How about the Solar System Trail to the volcano?"
D: "Fine."
And off we went. Then it struck me: Where else could you be serious about that question?
OK, OK, the volcano's been extinct for some 8-15 million years. And little more than its plug remains, the rest long lost to erosion.
Disappointed that it's not active? Not me. I've had some training in volcanology. Hard not to notice the many gruesome and often unexpected ways an active volcano can do you in. Trust me, the only good volcano to have this close to home is a dead one.
When this dacite lava froze up in the throat of the volcano after its final eruption, it broke into the roughly hexagonal vertical columns seen here. The technical name for this contractional cooling phenomenon is "columnar jointing".
The poster child of columnar jointing is everybody's favorite volcanic plug — Devils Tower in Wyoming. (Photo stolen from the web.)
This prominent local peak is formally Cerro de la Calavera, with Calavera Lake below. But many locals call it "Calavera volcano" or just "the volcano". A dozen or so volcanos of this type and vintage dot western SoCal south of LA.
Lots of easy gravel riding right around Calavera Lake, but you'd need an MTB to climb higher.
Wasn't making up the solar system part, either. This favorite local MUP, 3 mi long, is flattish gravel and packed dirt below, then steep pavement up to lake level.
Nicely done signs along the MUP tell about the Sun and planets, with the Sun at the top. The planet signs are spaced in proportion to their actual distances from the sun.
Only a few bike lengths from the sun to Mercury.
Huge jump in sign spacing after Mars. Sorry asteroids, no sign for you.
Surprisingly long ride from Uranus to Neptune.
And much longer still from Neptune to Pluto. Maybe Pluto was still a planet when the signs were made. Or maybe the folks responsible were just Pluto die-hards.
Me: "Where to?"
D: "You pick."
Me: "How about the Solar System Trail to the volcano?"
D: "Fine."
And off we went. Then it struck me: Where else could you be serious about that question?
OK, OK, the volcano's been extinct for some 8-15 million years. And little more than its plug remains, the rest long lost to erosion.
Disappointed that it's not active? Not me. I've had some training in volcanology. Hard not to notice the many gruesome and often unexpected ways an active volcano can do you in. Trust me, the only good volcano to have this close to home is a dead one.
When this dacite lava froze up in the throat of the volcano after its final eruption, it broke into the roughly hexagonal vertical columns seen here. The technical name for this contractional cooling phenomenon is "columnar jointing".
The poster child of columnar jointing is everybody's favorite volcanic plug — Devils Tower in Wyoming. (Photo stolen from the web.)
This prominent local peak is formally Cerro de la Calavera, with Calavera Lake below. But many locals call it "Calavera volcano" or just "the volcano". A dozen or so volcanos of this type and vintage dot western SoCal south of LA.
Lots of easy gravel riding right around Calavera Lake, but you'd need an MTB to climb higher.
Wasn't making up the solar system part, either. This favorite local MUP, 3 mi long, is flattish gravel and packed dirt below, then steep pavement up to lake level.
Nicely done signs along the MUP tell about the Sun and planets, with the Sun at the top. The planet signs are spaced in proportion to their actual distances from the sun.
Only a few bike lengths from the sun to Mercury.
Huge jump in sign spacing after Mars. Sorry asteroids, no sign for you.
Surprisingly long ride from Uranus to Neptune.
And much longer still from Neptune to Pluto. Maybe Pluto was still a planet when the signs were made. Or maybe the folks responsible were just Pluto die-hards.
Last edited: