Field notes · 2026 estimate
When to see peak color at Rancho San Antonio Open Space Preserve
Peak fall color is predicted around October 25. Plan for the strongest viewing window from October 20 to October 30.
- Predicted peak
- October 25
- Best window
- October 20 – October 30
- Confidence range
- ±5 days
- Color season
- October 10 – November 2
The prediction comes from 24 years of fall color records at this spot, checked against what observers on the ground saw. Where state foliage spotters report peak (New York, Pennsylvania, Wisconsin and Missouri), it has landed inside our ±5-day window about two years in three. An unusual summer or autumn can still move it further. Explore fall color around Santa Clara County and across California.
Fall color at Rancho San Antonio Open Space Preserve begins as early as October 10 in some spots and continues through November 2 in others — a 24-day window where you can catch peak color somewhere in the area regardless of when you visit.
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