
MileBuilt Gemini Springs 2-Day Challenge is a running and ultra race on January 23–24, 2027 in DeBary, FL, with entry fees from $35 to $85.
From the Organizer
THE RACE
The Gemini Springs 2-Day Challenge runs on Spring-to-Spring Trail/Pat Northey Pathway in DeBary, FL on January 23-24, 2027. An out-and-back on an accessible, measured trail. Palm hammock, live oak, and cypress. A tunnel of trees. Every repeat brings you back to the O.K. Corral for aid and to begin another out-and-back. It gets familiar real quick. That is the point.
Five distances: 5K · 10K · Half Marathon · Marathon · 50K. Core distances run both days. 50K is confirmed for this event.
START TIMES
7:00 AM — Marathon and 50K
7:10 AM — Half Marathon
8:00 AM — 5K and 10K
RACE DAY CUTOFF
4:00 PM. This applies to the full race day — not per distance. Runners still on course after the cutoff will be directed off course.
PARKING
To reach the O.K. Corral parking lot, turn left into the main entrance of Gemini Springs Park from Dirksen Drive. Follow the main park road, and when the road splits, stay to the left. This lane guides you directly into the West Parking Lot, which sits adjacent to the dog park and the O.K. Corral pavilion
AID STATION
Cupless event. Carry your own fluids — handheld bottle, vest, or waist pack. MileBuilt provides water, an electrolyte drink, and basic snacks. Do not rely on the aid station as your complete nutrition plan, especially for longer distances or multi-day participation.
BIB PICKUP
Available on race day beginning one hour before your scheduled start time — honor system, no ID required. A friend may pick up on your behalf. No bib transfers.
BARE-BONES EVENT
No shirts. No race bags. No expo.
FINISH
Not chip timed. When you finish: cross the line, strike the GONG, then complete the Clock Out at the MileBuilt Time Clock. Official finish times are recorded at the MileBuilt Time Clock and verified by the Race Director before results are posted. Every runner must complete the Clock Out process to receive an official finish record.
Weather
It's too far out for a forecast, so here's what weather on this date is normally like in the area. A race day forecast will replace this as race week approaches.
Typical High
70°
Typical Low
49°
Chance of Rain
26%
Based on US Climate Normals data from Sanford, 4 mi from the venue.
Host City
Population
22,602
as of 2023
City Elevation
67 ft
Nearest Airport
SFB
Orlando Sanford International Airport · 9 mi
Time Zone
Eastern Time
From Endurance Grid
A mid-size host city. Enough lodging and amenities to keep race weekend easy, without big-city sprawl.
Race Location
Your Next Start Line
Every finish line starts with a single decision. Claim your spot at MileBuilt Gemini Springs 2-Day Challenge, put it on the calendar, and turn “someday” into a start date.
144
Days to train
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From Endurance Grid
This race spans more than one sport — here’s a guide to each, so you can understand what’s involved and decide if it’s the right fit. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
From 5K to marathon, running races are an accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.
An ultramarathon is anything beyond the standard marathon — 50K, 50-mile, 100K, 100-mile, and timed events. Crossing the line is less about speed and more about not quitting.
Coming Up
MileBuilt Gemini Springs 2-Day Challenge
Jan 23, 2027