USARunning155mi · 249.4 km / 155.0 mi200mi · 321.9 km / 200.0 mi400mi · 643.7 km / 400.0 mi

Run the River: Rio Colorado Ultra Slam™

Spicewood, Texas · USA

When is the next Run the River: Rio Colorado Ultra Slam™?

Fri, 1 Jan 2027

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.

400mi · 2027-01-01: Not yet verified for this edition. Check the official race instructions.
200mi · 2027-01-01: Not yet verified for this edition. Check the official race instructions.
155mi · 2027-01-01: Not yet verified for this edition. Check the official race instructions.

About Run the River: Rio Colorado Ultra Slam™

Run the River: Rio Colorado Ultra Slam™ is a running event in Spicewood, Texas, United States. Recorded disciplines include 155mi, 200mi, 400mi. The next listed date is Friday, 1 January 2027. 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.

400mi · 643.7 km / 400.0 mi
Fri, 1 Jan 2027
Start time not yet verified
Entries open
Entry details
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Run the River: Rio Colorado Ultra Slam™ · 400mi · 643.7 km / 400.0 mi
2027-01-01 · Date-only reminder
Venue / race area: Spicewood, Texas, United States
Race website
Date-only reminder: start time to be confirmed.
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Run the River: Rio Colorado Ultra Slam™ · 400mi · 643.7 km / 400.0 mi
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Date, and event "Rio Colorado Ultra Slam 400" confirmed on the organiser's RunSignup entry page for the 2027 edition (checked 2026-11-09). Registration shown as open. Local time America/Chicago.
Edition source
200mi · 321.9 km / 200.0 mi
Fri, 1 Jan 2027
Start time not yet verified
Entries open
Entry details
Add to calendar
Run the River: Rio Colorado Ultra Slam™ · 200mi · 321.9 km / 200.0 mi
2027-01-01 · Date-only reminder
Venue / race area: Spicewood, Texas, United States
Race website
Date-only reminder: start time to be confirmed.
Google Calendar Outlook.com Microsoft 365 Apple 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: Rio Colorado Ultra Slam™ · 200mi · 321.9 km / 200.0 mi
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Choose where to share, then select who to send it to.
Date, and event "Rio Colorado Ultra Slam 200" confirmed on the organiser's RunSignup entry page for the 2027 edition (checked 2026-11-09). Registration shown as open. Local time America/Chicago.
Edition source
155mi · 249.4 km / 155.0 mi
Fri, 1 Jan 2027
Start time not yet verified
Entries open
Entry details
Add to calendar
Run the River: Rio Colorado Ultra Slam™ · 155mi · 249.4 km / 155.0 mi
2027-01-01 · Date-only reminder
Venue / race area: Spicewood, Texas, United States
Race website
Date-only reminder: start time to be confirmed.
Google Calendar Outlook.com Microsoft 365 Apple 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: Rio Colorado Ultra Slam™ · 155mi · 249.4 km / 155.0 mi
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Choose where to share, then select who to send it to.
Date, and event "Rio Colorado Ultra Slam 150" confirmed on the organiser's RunSignup entry page for the 2027 edition (checked 2026-11-09). Registration shown as open. Local time America/Chicago.
Edition source

Location & race day

Listed venue / area

Spicewood, TexasUSA

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: Rio Colorado Ultra Slam™ takes place in Spicewood, Texas. Its 2027 entry page on RunSignup lists: Rio Colorado Ultra Slam 150, Rio Colorado Ultra Slam 200, Rio Colorado Ultra Slam 400.

Race website

Entry options for

Ways to enter

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

Fri, 1 Jan 2027

Official race entry

Official entry

Entries open

Recorded Mon, 9 Nov 2026

View Official race entry

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: Rio Colorado Ultra Slam™ is 1 January 2027.

Where is it held?

Run the River: Rio Colorado Ultra Slam™ is listed in Spicewood, Texas, United States. Check the event's race-day instructions for the exact start location.

Which distances are listed?

The programme listed for 1 January 2027 includes 400mi, 200mi, 155mi.

What time does it start?

Listed starts for 1 January 2027: 400mi: start time not yet verified; 200mi: start time not yet verified; 155mi: start time not yet verified. Times are local to the race venue. Follow the start or wave assigned to your entry.