diff --git a/days/2026-09-21.md b/days/2026-09-21.md
index 7854634..f491dc2 100644
--- a/days/2026-09-21.md
+++ b/days/2026-09-21.md
@@ -16,5 +16,5 @@
 ## Notes
 
 - Silicon Valley and the Golden Gate sunset moved to [Sep 20](2026-09-20.md)
-- **Alcatraz** — ferry from Pier 33, ~2.5–3 hrs, no car needed. Sells out weeks ahead — reserve early if wanted
+- **Alcatraz** — ferry from Pier 33, ~2.5–3 hrs, no car needed. Tickets: [alcatrazcitycruises.com](https://www.alcatrazcitycruises.com/)
 - **Monday:** some museums (incl. the de Young, Computer History Museum) are closed
diff --git a/sf_sights.md b/sf_sights.md
index bdc23e2..0b8dfff 100644
--- a/sf_sights.md
+++ b/sf_sights.md
@@ -15,7 +15,7 @@
 - **Fisherman's Wharf / Pier 39** — sea lions
 - **Ghirardelli Square** — chocolate + waterfront dining
 - **Coit Tower** — city + bay views from Telegraph Hill
-- **Alcatraz** — ferry from Pier 33, ~2.5–3 hrs round trip. *Book weeks ahead — sells out*
+- **Alcatraz** — ferry from Pier 33, ~2.5–3 hrs round trip. Tickets: [alcatrazcitycruises.com](https://www.alcatrazcitycruises.com/)
 
 ## Downtown / Central