USARunningRoad100mi · 160.9 km / 100.0 mi50K · 50 km / 31.1 mi50mi · 80.5 km / 50.0 mi

KEYS100 Ultramarathon

Key West, Florida · USA

When is the next KEYS100 Ultramarathon?

Sat, 15 May 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.

50mi · 2027-05-15: Not yet verified for this edition. Check the official race instructions.
50K · 2027-05-15: Not yet verified for this edition. Check the official race instructions.
100mi · 2027-05-15: Not yet verified for this edition. Check the official race instructions.

About KEYS100 Ultramarathon

KEYS100 Ultramarathon is a running event in Key West, Florida, United States. Recorded disciplines include 100mi, 50K, 50mi. The listed surface is road. The next listed date is Saturday, 15 May 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.

50mi · 80.5 km / 50.0 mi
Sat, 15 May 2027
Starts 09:00 local time
Entries open
Entry details
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KEYS100 Ultramarathon · 50mi · 80.5 km / 50.0 mi
2027-05-15 · Date-only reminder
Venue / race area: Key West, Florida, United States
Race website
Date-only reminder: check the local start time and timezone with the organiser.
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KEYS100 Ultramarathon · 50mi · 80.5 km / 50.0 mi
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Date, 09:00 start and event "50 Mile Individual Ultra" (50mi) confirmed on the organiser's RunSignup entry page for the 2027 edition (checked 2026-11-09). Local time America/New_York.
Edition source
50K · 50 km / 31.1 mi
Sat, 15 May 2027
Starts 12:00 local time
Entries open
Entry details
Add to calendar
KEYS100 Ultramarathon · 50K · 50 km / 31.1 mi
2027-05-15 · Date-only reminder
Venue / race area: Key West, Florida, United States
Race website
Date-only reminder: check the local start time and timezone with the organiser.
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
KEYS100 Ultramarathon · 50K · 50 km / 31.1 mi
WhatsApp Facebook X Telegram Email
Choose where to share, then select who to send it to.
Date, 12:00 start and event "50 Kilometer Individual Ultra" (50K) confirmed on the organiser's RunSignup entry page for the 2027 edition (checked 2026-11-09). Local time America/New_York.
Edition source
100mi · 160.9 km / 100.0 mi
Sat, 15 May 2027
Starts 05:30 local time
Entries open
Entry details
Add to calendar
KEYS100 Ultramarathon · 100mi · 160.9 km / 100.0 mi
2027-05-15 · Date-only reminder
Venue / race area: Key West, Florida, United States
Race website
Date-only reminder: check the local start time and timezone with the organiser.
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
KEYS100 Ultramarathon · 100mi · 160.9 km / 100.0 mi
WhatsApp Facebook X Telegram Email
Choose where to share, then select who to send it to.
Date, 05:30 start and event "100 Mile Individual Ultra" (100mi) confirmed on the organiser's RunSignup entry page for the 2027 edition (checked 2026-11-09). Local time America/New_York.
Edition source

Location & race day

Listed venue / area

Key West, FloridaUSA

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

KEYS100 Ultramarathon takes place in Key West, Florida. Its 2027 entry page on RunSignup lists: 100 Mile Individual Ultra, 50 Mile Individual Ultra, 50 Kilometer Individual Ultra.

Surface:: Road

Race website

Entry options for

Ways to enter

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

Sat, 15 May 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 KEYS100 Ultramarathon is 15 May 2027.

Where is it held?

KEYS100 Ultramarathon is listed in Key West, Florida, United States. Check the event's race-day instructions for the exact start location.

Which distances are listed?

The programme listed for 15 May 2027 includes 50mi, 50K, 100mi.

What time does it start?

Listed starts for 15 May 2027: 50mi: 09:00 local time; 50K: 12:00 local time; 100mi: 05:30 local time. Times are local to the race venue. Follow the start or wave assigned to your entry.