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Running

Ancient Oaks 100-Mile Endurance Run

Date
December 19–20, 2026
Distance
Ultra
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From the Organizer

ENTRY INTO THE LOTTERY WILL ABSOLUTELY END AT MIDNIGHT EASTERN TIME JUNE 30!

DON'T BE LATE - YOU WON'T GET IN!

This is an Invitation-Only, No-Fee, Low-Aid race held in the Enchanted Forest Nature Sanctuary in Titusville, Florida the third weekend in December.  The 2026 dates are Saturday-Sunday December 19-20, 2026.  Race start time is 7:00 AM Saturday morning, and runners have 32 hours exactly to finish 29 loops of a 3.46-mile course for a total of 100.34 miles.  The race has a hard 60-runner cap on entries, per agreement with the park.

 

In order to run, you must receive an Invitation to Run.  In order to get one of those, you need to click on the WAITING LIST button located above, ANY TIME between 12:01 AM June 1, 2026 and 11:59 PM June 30, 2026 with a Request for an Invitation to Run.  This will automatically place you on the Wait List, and the Entry List will be drawn from this Wait List on or about July 3, 2026.

 

Please do BOTH of us a favor and use an email address that you KNOW you will be using for the entire year.  Each year, I get a handful of Requests from people using some email address that ends up being disabled somehow, and when I try and contact them at a later date, the email ends up floating endlessly in the ether of the universe, and they never receive my follow-up communications.  I would strongly suggest against using a work email address, since work situations can and do change at a moment's notice.

 

Invitations to Run will be sent out via email on or about July 3, 2026.  Everyone will either receive an Invitation to Run, or will be given a place on the Wait List.

 

It matters not how many ultras or 100-milers you have run, nor how fast you are.  It matters not if you're running for your own reasons, or if you're running for a charitable cause greater than yourself.  What matters is that you want to test yourself against the course and the time limit, and that you take your entry into the race seriously.

 

The Selection Process is unfair, just like life is unfair.  No race that has more possible runners than entry slots has an entry process that's fair.  Umstead's process of first come, first served fastest computer wins, is unfair.  Western States' lottery system is unfair, Hardrock 100's logistical ticket system is unfair, Massanutten's stock-market-based system is unfair, and the Barkley Marathons' entry process is unfair.  The process for selection into Ancient Oaks is no less unfair than any of those processes, and may be even more unfair than any of those other processes.  The Selection Process is also private, and will not be disclosed, since it would lead to some runners trying to 'game' the system.  IMPORTANT:  THERE IS NO BUCKLE AS AN AWARD FOR FINISHING.  There hasn't ever been a buckle offered since the race's inception, and as of this writing, there are no plans in the works to offer one in the future.  If any of this is a problem for you, then there are more than 150 other 100-mile races to choose from, and you should choose to run one of those other races.

Events

100-Mile Run

Weather

Typical Conditions

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

71°

Typical Low

54°

Chance of Rain

26%

Based on US Climate Normals data from Titusville, 7 mi from the venue.

Sunrise 7:11 AMSunset 5:31 PMDaylight 10h 20m

Host City

About Titusville, FL

City Elevation

8 ft

Nearest Airport

SFB

Orlando Sanford International Airport · 28 mi

Time Zone

Eastern Time

From Endurance Grid

Line up lodging and travel early to lock in your race weekend.

Race Location

Your Next Start Line

What Are You
Waiting For?

Every finish line starts with a single decision. Claim your spot at Ancient Oaks 100-Mile Endurance Run, put it on the calendar, and turn “someday” into a start date.

185

Days to train

Race
Ancient Oaks 100-Mile Endurance Run
Date
December 19–20, 2026

From Endurance Grid

About These Sports

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.

Running

From 5K to marathon, running races are the most accessible entry point into endurance sport. There's a distance for every fitness level and a community at every start line.

Trail Running

Running off-road — dirt, singletrack, and mountain paths — from 5Ks to ultras. The terrain, not the pace, is the whole point.

Frequently Asked Questions (FAQs)

What is the Ancient Oaks 100-Mile Endurance Run?
Ancient Oaks 100-Mile Endurance Run is a running race held in Titusville, Florida on December 19, 2026. It is one of the many endurance events listed on Endurance Grid, a multi-sport endurance event calendar covering running races, triathlons, HYROX, and more endurance sports across the United States. Find more running races near you or explore our sports guides to learn what race day actually feels like.
When and where is the Ancient Oaks 100-Mile Endurance Run?
Saturday, December 19, 2026 in Titusville, Florida at 444 Columbia Blvd. Check the event page for exact start times and wave schedules.
How do I register for the Ancient Oaks 100-Mile Endurance Run?
Registration is handled through the event's registration page. Confirm pricing and distances there, and sign up.

Ancient Oaks 100-Mile Endurance Run

Dec 19, 2026

Register →