​Field Notes are a constellation of small, wooden-hinged blocks affixed to fence posts, benches and stumps along park trails that contain hidden messages that invite park visitors of all ages to explore and make discoveries about the Presidio’s natural world.

There are at least 10 Field Notes each season, each containing a unique observational prompt – for instance, a visitor can look for a locally rare butterfly in the spring, discover a remnant of a historic rose garden in the summer, or smell fragrant California sage in the fall. A visitor can access this page and the Field Notes map through a QR Code inside the blocks. See the below list of Field Notes, their coordinating location on the map to the right, and learn more about how QR codes work.

 Summer 2022 Field Notes

Presidio Main Post field note

​1. Main Post/Tunnel Tops

Learn more about the palms at the Presidio’s Main Post through a Field Note located on some fallen logs at the corner of Graham and Owen Streets.

Crissy Field field note

2. Crissy Field

Ever wonder about the creatures that live in the sand dunes along the Presidio’s beaches? Find the Field Note located off the Crissy Field Promenade near the Gulf of the Farallones Visitor Center.

Lower Tennessee Hollow Watershed

​3. Lower Tennessee Hollow Watershed

Check out this field note and listen to the music of the “ancient avian soundtrack” that can be heard along the Tennessee Hollow Trail near Lincoln Boulevard.

Upper Tennessee Hollow Watershed field note

​4. Upper Tennessee Hollow Watershed

There’s not better time to enjoy the wonders of berries in summertime when they come alive in the park. Find a note about “Berryland” along the boardwalk at El Polin Spring.

Mountain Lake and Lobos Creek Valley

5. Mountain Lake/Lobos Creek Valley

Did you know the Lobos Creek Valley is THE lizard hot spot in the City? Find a Field Note along the Lobos Creek Valley boardwalk to learn more about lizards in the park.

Baker Beach field note

6. Baker Beach

This spot is a kind of big sister to the Tunnel Tops Outpost (also though it’s much smaller!). Look for a spectacular display of a wildflower that reminds many of a Dr. Seuss book!

Coastal Bluffs field note

​7. Coastal Bluffs

This is a spectacular spot to see soaring flocks of a once endangered pelican. Learn more by looking for the Field Note located on the rugged Batteries-to-Bluffs Trail.

Fort Scott and Rob Hill field note

​8. Fort Scott/Rob Hill

Summer sees the final stretch of bird nesting season in the park. The Field Note on the sidewalk near Building 1216 on the east side of the meadow invites you to observe scissor-tailed swallows swooping to catch f food for their chicks.

Horse Stable/Park Trail/National Cemetery

​9. Horse Stable/Park Trail/National Cemetery

Do you see the Cypress “kids and elders” along the Park Trail? These are the little trees and big, older trees. Learn more about the lifespan of these trees at the Field Note along the trail’s wooden railing.

Fort Point and Torpedo Wharf field note

​10. Fort Point/Torpedo Wharf

Moon + tides + rocks = forces of nature. A hands-on opportunity of discovery awaits you at this Field Note!



An essential part of this pilot is a dynamic QR code featured inside each block – this is a barcode that is a machine-readable, optical label that contains information about the item to which it is attached. You might have used a QR code at a restaurant to access a menu, for instance.

Access the Field Notes QR codes by using a smart phone and focusing the “photo” app – as if to take a photo – on the square code. This will trigger the code and make a link pop up linking to your phones browser where you’ll find this page (which includes a map and more information so you can explore all of the Presidio Field Notes).


Field Notes are part of our outdoor self-guided experiences provided to visitors as we gear up for the opening of Presidio Tunnel Tops. Building on the success of a prototype of a Field Note that was located near El Polín Spring in 2019, Presidio Field Notes is a park-wide pilot. Each season, Presidio Field Notes will be relocated to new sites and will contain updated, seasonal content to encourage visitors to explore their environment and learn more about the ecology of the Presidio.​​