St. Vrain for the Brain 5K
Niwot, CO
Aug 8, 2026
The St. Vrain for the Brain 5K is a fun 5k in which all of the proceeds benefit the National Brain Tumor Society, an organization fighting to end brain cancer everywhere. The race takes place on the beautiful trails around Niwot and finishes up with fun activities on the field … MORE
Local Historical Weather (Aug 08):
| 2025 | 2024 | 2023 | 2022 | 2021 | |
| H (°F) | 100 | 68 | 83 | 90 | 94 |
| L (°F) | 66 | 61 | 54 | 62 | 57 |
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