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Welcome to the Thinkwalks email list. I send out emails with tidbits from my research, Seep City mapping, publications, invitations to explore and other fun stuff, but not more than once or twice a month. I tend to focus on water and natural history, social history and geography.

Trouble signing up? Contact me at the below email address.

Thinkwalks are nerdy explorations of San Francisco designed especially for locals. Donations are encouraged at the end of each Thinkwalk ($20 to $40 is the usual range but no one is turned away.)

http://www.thinkwalks.org/

– Joel Pomerantz <joel@thinkwalks.org>

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12/17/25

Too much curious stuff

Hello Thinkwalkers of the world, especially of San Francisco, In this news rounddown: ➤🤡 Puzzle your

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Too much curious stuff

Hello Thinkwalkers of the world, especially of San Francisco, In this news rounddown: ➤🤡 Puzzle your

12/17/25

Joel Pomerantz2

10/18/25

Declaring against the king

Here's (attached) a PDF flyer version of that list you can print and hand out, if you like. Joel

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Declaring against the king

Here's (attached) a PDF flyer version of that list you can print and hand out, if you like. Joel

10/18/25

8/29/25

Malcolm Margolin & a bit more

Before I get to the news about Malcolm, a practical note: The walk for this weekend is now full. I

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Malcolm Margolin & a bit more

Before I get to the news about Malcolm, a practical note: The walk for this weekend is now full. I

8/29/25

8/29/25

5 spots open this Sunday at 1pm

Hi Thinkwalker, If you're free to join a Thinkwalk on Sunday at 1pm, there are now… FIVE spots

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5 spots open this Sunday at 1pm

Hi Thinkwalker, If you're free to join a Thinkwalk on Sunday at 1pm, there are now… FIVE spots

8/29/25

8/12/25

Upcoming Thinkwalks spots open!

Hi Walkthinker (or something), Think about these, and reply if you want a spot to join a Thinkwalk

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Upcoming Thinkwalks spots open!

Hi Walkthinker (or something), Think about these, and reply if you want a spot to join a Thinkwalk

8/12/25

7/9/25

Map down. Needed: large format print resource?

Hi! It's me, Joel, the guy whose SF Water History map was up in a prime spot on Divisadero Street

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Map down. Needed: large format print resource?

Hi! It's me, Joel, the guy whose SF Water History map was up in a prime spot on Divisadero Street

7/9/25

6/20/25

Lake Merritt Festival tomorrow—get yr jig puzz on!

Do you plan to be at the Lake?!? Lake Merritt Festival is 11 to 7. Saturday June 21. I will be there

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Lake Merritt Festival tomorrow—get yr jig puzz on!

Do you plan to be at the Lake?!? Lake Merritt Festival is 11 to 7. Saturday June 21. I will be there

6/20/25

Joel Pomerantz3

5/30/25

Unaccepted streets

One last addendum fro Jeremiah: A much better link: https://www.spur.org/news/2011-09-14/vision-new-

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Unaccepted streets

One last addendum fro Jeremiah: A much better link: https://www.spur.org/news/2011-09-14/vision-new-

5/30/25

5/14/25

Eureka Valley Thinkwalks (spots open) & a rupture!!

Hi! There are still about half the spots open for the May 24 and May 30 Thinkwalks listed below.

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Eureka Valley Thinkwalks (spots open) & a rupture!!

Hi! There are still about half the spots open for the May 24 and May 30 Thinkwalks listed below.

5/14/25

5/6/25

May Thinkwalks + CDNC ALERT!

Hello to you! I invite you to an elevated Thinkwalk this Saturday—or one of the other days listed.

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May Thinkwalks + CDNC ALERT!

Hello to you! I invite you to an elevated Thinkwalk this Saturday—or one of the other days listed.

5/6/25

4/21/25

Better video & puzz pics & pre-order a puzzle!

Hey Thinker, When I sent you my note last week (it's pasted below), it hit your eyeballs without

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Better video & puzz pics & pre-order a puzzle!

Hey Thinker, When I sent you my note last week (it's pasted below), it hit your eyeballs without

4/21/25

4/18/25

This new water map is a jigsaw puzzle

Hi, and brace yourself for happy good news. I know, it's shocking. While I was camping and bike

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This new water map is a jigsaw puzzle

Hi, and brace yourself for happy good news. I know, it's shocking. While I was camping and bike

4/18/25

3/18/25

Art you need to see, & to go see

Hi Thinkwalkers, This amazing fabric artist is doing some quilting of maps! Cheryl Braswell's

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Art you need to see, & to go see

Hi Thinkwalkers, This amazing fabric artist is doing some quilting of maps! Cheryl Braswell's

3/18/25

3/7/25

8 spots for Thinkwalk tomorrow

People who meant to go on tomorrow's walk are suddenly unavailable! Suddenly there are 8 spots

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8 spots for Thinkwalk tomorrow

People who meant to go on tomorrow's walk are suddenly unavailable! Suddenly there are 8 spots

3/7/25

2/21/25

Another Mission Creek walk next Saturday

Hello again Thinkwalker! As tomorrow's walk is now completely full, I have set up another that

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Another Mission Creek walk next Saturday

Hello again Thinkwalker! As tomorrow's walk is now completely full, I have set up another that

2/21/25

2/19/25

Thinkwalk on Sat Feb 22 9am (North Mission–Mission Creek)

Hello fellow Thinkwalker, Please join me for a 2 to 2¼ hour walk early on Saturday (Feb 22 at 9:00 am

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Thinkwalk on Sat Feb 22 9am (North Mission–Mission Creek)

Hello fellow Thinkwalker, Please join me for a 2 to 2¼ hour walk early on Saturday (Feb 22 at 9:00 am

2/19/25

2/9/25

Monday at 2:30 Thinkwalk

Hi Thinkwalkers, Someone finally asked me to schedule a walk. These days that's the best way to

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Monday at 2:30 Thinkwalk

Hi Thinkwalkers, Someone finally asked me to schedule a walk. These days that's the best way to

2/9/25

12/27/24

Do this immediately to slap down Trump

Hello friends and associates. I will get back to regular Thinkwalks programming when events allow.

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Do this immediately to slap down Trump

Hello friends and associates. I will get back to regular Thinkwalks programming when events allow.

12/27/24

10/18/24

Still 4 spots available today!

Hi Thinkwalker, There are spots left if you want to join the walk at 5:45 at Parnassus campus. Let me

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Still 4 spots available today!

Hi Thinkwalker, There are spots left if you want to join the walk at 5:45 at Parnassus campus. Let me

10/18/24

10/14/24

A walk, a fest, & other results of research

Hi friend, As a member of the Thinkwalks list, you may have become used to emails mostly aiming to

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A walk, a fest, & other results of research

Hi friend, As a member of the Thinkwalks list, you may have become used to emails mostly aiming to

10/14/24

8/22/24

A Labor Day Thinkwalk 10-1 in the Marina & Presidio

Join us for a Thinkwalks exploration in the Marina District and Presidio of San Francisco! Reserve by

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A Labor Day Thinkwalk 10-1 in the Marina & Presidio

Join us for a Thinkwalks exploration in the Marina District and Presidio of San Francisco! Reserve by

8/22/24

7/9/24

More walks + "achievement" of humanity

Good morning! I have more Thinkwalks for you. Before I talk the walks, you may wish to know that for

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More walks + "achievement" of humanity

Good morning! I have more Thinkwalks for you. Before I talk the walks, you may wish to know that for

7/9/24

Joel Pomerantz2

6/26/24

Three Thinkwalks coming - sign up!

The June 29 walk is now full. There are spaces left on the other two walks, July 11 and 13. If you

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Three Thinkwalks coming - sign up!

The June 29 walk is now full. There are spaces left on the other two walks, July 11 and 13. If you

6/26/24

5/28/24

Thinkwalks—11am this Thurs & 9am June 7

NOTE: timing for Thursday May 30th has changed to 11am start.* Please join us for one or the other of

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Thinkwalks—11am this Thurs & 9am June 7

NOTE: timing for Thursday May 30th has changed to 11am start.* Please join us for one or the other of

5/28/24

12/12/23

Fabric maps of many kinds! Seep City, Lake Merritt, not just shower curtains anymore…

Hello showerer! There are three (3) or four (4) kinds of new water maps to (2) be had! Do the math!

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Fabric maps of many kinds! Seep City, Lake Merritt, not just shower curtains anymore…

Hello showerer! There are three (3) or four (4) kinds of new water maps to (2) be had! Do the math!

12/12/23

9/22/23

Natural History slide show this eve

Hello SF Explorer! Come see Greg Gaar's slide show on A Natural History of San Francisco. Over

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Natural History slide show this eve

Hello SF Explorer! Come see Greg Gaar's slide show on A Natural History of San Francisco. Over

9/22/23

Joel Pomerantz2

9/15/23

4 spots suddenly open 10am to 1pm on Sunday's Thinkwalk

Oh geeez! I know that was fast, but it's already over-full again! We'll be a couple people

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4 spots suddenly open 10am to 1pm on Sunday's Thinkwalk

Oh geeez! I know that was fast, but it's already over-full again! We'll be a couple people

9/15/23

7/31/23

A Presidio of SF Thinkwalk on Aug 7

People on this list seem ready for more. So… It's only a week ahead, but I have a feeling you

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A Presidio of SF Thinkwalk on Aug 7

People on this list seem ready for more. So… It's only a week ahead, but I have a feeling you

7/31/23

7/20/23

Talks now available on YouTube

Hello water walkers, thinklers, sprinklers and talkers! The Zoom presentation I mentioned in my email

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Talks now available on YouTube

Hello water walkers, thinklers, sprinklers and talkers! The Zoom presentation I mentioned in my email

7/20/23

7/13/23

My online (zoom) presentation today at 3 p.m.

I just got back from my first road trip in quite some time. A couple weeks in the green high deserts.

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My online (zoom) presentation today at 3 p.m.

I just got back from my first road trip in quite some time. A couple weeks in the green high deserts.

7/13/23

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