Thornton
Colorado, United States ·
5.1- Distance
- 25 mi · 40 km
- Drive
- 35 min
Boulder to Thornton
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The two cities
Last verified September 25, 2026 · Source: Research spreadsheet · Editorial ·
Thornton → Boulder Route Circle
For people considering or completing the trip between Thornton and Boulder: how long to stay, how to get there, and what to add or skip.
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