Inventors and firsts
What Makes Marin County Special?
Marin's first mountain bikes. A true story near Marin County, CA, told for kids 3–10.
The Golden Gate Bridge story, read aloud
Look out the window! Do you see a hill? Marin has lots and lots of hills. Big hills. Bumpy hills. Green hills. From the big city, you cross a big red bridge to get here.
And guess what people did on these hills? They rode bikes! Not on the smooth road. Down the bumpy dirt! Bumpity, bump, bump! Some of the very first mountain bikes zoomed down hills right here. Big fat tires.
Whoosh! Their bottoms bounced like popcorn in a pot! Now people all over the world ride mountain bikes. Let's make a bike sound together. Ready? Bumpity, bump, whoosh!
Quiz the back seat
Where did those first mountain bikes ride?
Show the answer
Down bumpy dirt hills. Down bumpy dirt hills! And Marin has giant redwood trees too, some of the tallest trees anywhere.
Golden Gate Bridge facts for kids
- Marin County is across the Golden Gate Bridge from San Francisco.
- Modern mountain biking has many early origins on the slopes of Marin's hills, like Mount Tamalpais.
- Marin is home to the Muir Woods redwood forest.
The Golden Gate Bridge story, read aloud
You live in Marin County, just across the Golden Gate Bridge from San Francisco. Marin has redwood forests, beaches, and a big mountain called Mount Tam. And Marin is one of the places where the mountain bike got its start! Did you know bikes didn't always have fat, bumpy tires for dirt trails? About fifty years ago, when your grandparents were young, a group of friends loved riding down the dirt roads on Mount Tam. But most bikes back then were made for smooth streets.
So the friends found old, heavy bikes with thick tires. They raced them down one steep, twisty dirt road. They went so fast that their brakes got super hot! Inside each brake was grease, a slippery goo that helps the parts move. The heat made the grease smoke and burn right out. So after every ride, the riders had to stuff new grease back in.
That job was called repacking. Can you guess what they named the road? They called it Repack, after their smoky brakes! Then some of the friends started building brand new bikes, strong enough for mountains, with lots of gears. Now kids all over the world ride mountain bikes, and part of that story began on Mount Tam, right here in Marin.
Quiz the back seat
Why did the riders name the road Repack?
Show the answer
They had to put new grease in their brakes. Yes! Their brakes got so hot that the grease burned out, so they repacked them with new grease after every ride.
Golden Gate Bridge facts for kids
- Modern mountain biking has many of its early beginnings on the slopes of Mount Tamalpais in Marin County.
- Riders on Mount Tam's steep Repack road had to repack their hot brakes with new grease after each run.
- Marin County is across the Golden Gate Bridge from San Francisco.
Questions kids ask about Golden Gate Bridge
How do you get to Marin County from San Francisco?
You can cross the big red Golden Gate Bridge.
Did mountain biking start in Marin County?
Some of the very first mountain bikes zoomed down the bumpy dirt hills of Marin.
Are there big trees in Marin County?
Yes, Marin has giant redwood trees in places like Muir Woods.
For grown-ups
Written with AI from public sources, then checked claim by claim against the sources below before it was published; stories that don't pass stay off the app and this site. Narration is pre-recorded, and nothing you do on this page is tied to your kids.
Sources
- en.wikipedia.org/wiki/Golden_Gate_Bridge
- parksconservancy.org/parks/golden-gate-bridge
- en.wikipedia.org/wiki/Marin_County%2C_California
- mmbhof.org/mtn-bike-hall-of-fame/history
- visitmarin.org/blog/marin-arts-and-culture-collection/marin-countys-history-of-mountain-biking
- nps.gov/muwo
- en.wikipedia.org/wiki/Muir_Woods_National_Monument
- parksconservancy.org/parks/muir-woods-national-monument
More stories in Marin County
The first people here The Leader Who Named Marin
Do you live in Marin County? Then guess what!
Trains, ships and planes The Skinny Train Over the Hills
You live in Marin County, a place full of hills. So how did a train ever get over all these hills?
The first people here The Chief Behind the Name
Here's a riddle. The place we're driving through has a name.
Trains, ships and planes The Super Fast Ship Builders
Long ago, not far from here in Marin, there was a giant ship-building place. It sat by the bay in a town called Sausalito, and it was…How things work: roads, bridges, oceans →All stories →
Between stories: 25 road trip games for kids · Road trip bingo cards · Road trip trivia · Christmas light scavenger hunt · Christmas trivia
Town and county names: GeoNames (CC BY 4.0).