Distance between Boulder and San Marcos
Distance from Boulder, CO to San Marcos, CA is 812 miles / 1307 kilometers.
Map showing the distance from Boulder to San Marcos
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Air distance: | miles km |
Boulder, CO
| City: | Boulder, CO |
| Country: | United States |
San Marcos, CA
| City: | San Marcos, CA |
| Country: | United States |
Time difference between Boulder and San Marcos
The time difference between Boulder and San Marcos is 1 hour. San Marcos is 1 hour behind Boulder. Current local time in Boulder is 12:21 MST (2025-01-20) and time in San Marcos is 11:21 PST (2025-01-20).