Race day is here! · Sun, Jul 26, 2026
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When
Sunday, July 26th, 2026
Where
Plaza at One Loudoun, Ashburn VA
Distances
5K
Typical weather
70–89°F · some rain risk
See last 10 years
Rained on 1 of the last 10 race days
2025
76–91°F
dry
2024
64–84°F
dry
2023
66–94°F
dry
2022
71–81°F
rain
2021
71–92°F
dry
2020
72–95°F
dry
2019
64–87°F
dry
2018
68–86°F
dry
2017
64–83°F
dry
2016
78–96°F
dry
Best months to race in Virginia →
Race-day forecast · Sunday, Jul 26
Cloudy · 66–87°F
Sunday, Jul 2618% chance of rain · wind up to 10 mph
About this race
Race Overview
- Event Name: Birthday Bash 5K
- Date: July 26, 2026
- Location: Plaza at One Loudoun, Ashburn, VA
- Registration Link: Register Here
Event Details
- Celebration: Potomac River Running is turning 22!
- Join Us: Celebrate with =PR= Fairfax on Sunday, July 26!
- Party Vibes: We are ready to party!
- Packet Pick Up: Click for Packet Pick Up Details
Course map
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