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Events
USARunningTrail50K · 50 km / 31.1 mi51.7mi · 83.2 km / 51.7 miHalf · 21.1 km / 13.1 mi

Run the River Ultra

Williamsburg, Virginia · USA

When is the next Run the River Ultra?

3 distances · see start times below

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Time limits and cut-offs

Some events have a finishing deadline or intermediate checkpoint cut-offs. These can vary by distance, start wave and edition.

Half · 2026-12-05
Not yet verified for this edition. Check the official race instructions.

No official finish time limit has been verified by AthRecs for this edition. This does not mean there is no cut-off.

Check organiser information
50K · 2026-12-05
Not yet verified for this edition. Check the official race instructions.

No official finish time limit has been verified by AthRecs for this edition. This does not mean there is no cut-off.

Check organiser information
51.7mi · 2026-12-05
Not yet verified for this edition. Check the official race instructions.

No official finish time limit has been verified by AthRecs for this edition. This does not mean there is no cut-off.

Check organiser information

About Run the River Ultra

Run the River Ultra is a running event in Williamsburg, Virginia, United States. Recorded disciplines include 50K, 51.7mi, half marathon. The listed surface is trail. The next listed date is Saturday, 5 December 2026. Check the organiser's information for entry and race-day arrangements.

Dates, starts & entry

Times are local to the race. Select the entry route for your distance.

  • Half · 21.1 km / 13.1 mi

    Sat, 5 Dec 2026

    Starts 15:00 GMT-5

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    Run the River Ultra · Half · 21.1 km / 13.1 mi

    2026-12-05 · 15:00 (America/New_York)

    Venue / race area: Williamsburg, Virginia, United States

    Race website

    Start reminder only; finish time is not confirmed. Adjust the calendar duration if needed.

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    Run the River Ultra · Half · 21.1 km / 13.1 mi

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    Date, 15:00 start, and event "Half Marathon" confirmed on the organiser's RunSignup entry page for the 2026 edition (checked 2026-11-09). Registration shown as open. Local time America/New_York.

    Edition source

  • 50K · 50 km / 31.1 mi

    Sat, 5 Dec 2026

    Starts 10:30 GMT-5

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    Run the River Ultra · 50K · 50 km / 31.1 mi

    2026-12-05 · 10:30 (America/New_York)

    Venue / race area: Williamsburg, Virginia, United States

    Race website

    Start reminder only; finish time is not confirmed. Adjust the calendar duration if needed.

    Google CalendarOutlook.comMicrosoft 365Apple Calendar

    Google and Outlook open a prepared event for you to save. Apple uses your private AthRecs race subscription. Download a one-off file only if you prefer to import it yourself.

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    Run the River Ultra · 50K · 50 km / 31.1 mi

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    Date, 10:30 start, and event "50K" confirmed on the organiser's RunSignup entry page for the 2026 edition (checked 2026-11-09). Registration shown as open. Local time America/New_York.

    Edition source

  • 51.7mi · 83.2 km / 51.7 mi

    Sat, 5 Dec 2026

    Starts 06:00 GMT-5

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    Run the River Ultra · 51.7mi · 83.2 km / 51.7 mi

    2026-12-05 · 06:00 (America/New_York)

    Venue / race area: Williamsburg, Virginia, United States

    Race website

    Start reminder only; finish time is not confirmed. Adjust the calendar duration if needed.

    Google CalendarOutlook.comMicrosoft 365Apple Calendar

    Google and Outlook open a prepared event for you to save. Apple uses your private AthRecs race subscription. Download a one-off file only if you prefer to import it yourself.

    Share

    Share this race

    Run the River Ultra · 51.7mi · 83.2 km / 51.7 mi

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    Date, 06:00 start, and event "51.7 Mile" confirmed on the organiser's RunSignup entry page for the 2026 edition (checked 2026-11-09). Registration shown as open. Local time America/New_York.

    Edition source

Location & race day

Listed venue / area

Williamsburg, VirginiaUSA

Find this location on a map

Confirm the exact start line, parking and arrival instructions with the organiser. A listed town or postcode may cover a wider area.

About the race

Run the River Ultra takes place in Williamsburg, Virginia. Its 2026 entry page on RunSignup lists: 51.7 Mile, 50K, Half Marathon.

Surface:
Trail
Race website

Ways to enter

Compare the listed booking routes. Verified links show when they were checked.

Sat, 5 Dec 2026

Third-party prices, booking fees, allocations and refund terms can differ. Confirm the final details with the provider before paying.

Race questions

When is the next event?

The next listed date for Run the River Ultra is 5 December 2026.

Where is it held?

Run the River Ultra is listed in Williamsburg, Virginia, United States. Check the event's race-day instructions for the exact start location.

Which distances are listed?

The programme listed for 5 December 2026 includes Half marathon, 50K, 51.7mi.

What time does it start?

Listed starts for 5 December 2026: Half marathon: 15:00 GMT-5; 50K: 10:30 GMT-5; 51.7mi: 06:00 GMT-5. Times are local to the race venue. Follow the start or wave assigned to your entry.

How do I enter?

Use the listed entry options for your distance. Check the entry page for current availability, eligibility and deadlines.

Entry details

Results

Results have yet to be added for this race.

Past races

None listed yet.

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48th Colonial Half Marathon and 5K

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Running1.31mi · 2.1 km / 1.3 mi5K · 5 km / 3.1 miHalf · 21.1 km / 13.1 mi

48th Colonial Half Marathon and 5K: 1.31mi, 5K, Half in Williamsburg, Virginia, United States. View confirmed race dates, local start times and official entry details.

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Entries open

Details & entryRace website

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