
Hardest Ultra Marathon Relay | IRONHIKE OLYMPUS MONS - TRAIL BUDDY FLEX RELAY | Amicalola Falls State Park, Georgia | Team of 2 Athletes | 180 Miles | 84 Hour | Hardest Ultra on Earth | Run, Power Hike, Walk. | 72,480 feet of elevation gain and loss shared across two Mountain Athletes, up and down 604 stairs per lap for a total of 144,960 stairs on the AT Approach Trail staircase above Amicalola Falls. This is the hardest ultra on Earth, or Mars, built for buddying up. We are redefining race day. is a running race on December 9–13, 2026 in Dawsonville, GA, with an entry fee of $1890.
web2
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
52°
Typical Low
36°
Chance of Rain
30%
Based on US Climate Normals data from Jasper 1 Nnw, 13 mi from the venue.
City Elevation
1,313 ft
Nearest Airport
PDK
DeKalb Peachtree Airport · 41 mi
Major Hub
ATL
Hartsfield Jackson Atlanta International Airport · 59 mi
Time Zone
Eastern Time
From Endurance Grid
Line up lodging and travel early to lock in your race weekend.
Every finish line starts with a single decision. Claim your spot at Hardest Ultra Marathon Relay | IRONHIKE OLYMPUS MONS - TRAIL BUDDY FLEX RELAY | Amicalola Falls State Park, Georgia | Team of 2 Athletes | 180 Miles | 84 Hour | Hardest Ultra on Earth | Run, Power Hike, Walk. | 72,480 feet of elevation gain and loss shared across two Mountain Athletes, up and down 604 stairs per lap for a total of 144,960 stairs on the AT Approach Trail staircase above Amicalola Falls. This is the hardest ultra on Earth, or Mars, built for buddying up. We are redefining race day., put it on the calendar, and turn “someday” into a start date.
82
Days to train
Enter your email and we'll send more your way.
Endurance Grid is here to help you understand the sport, decide if it’s the right fit, and learn how to prepare. For course distances, logistics, and race-day specifics, always defer to the race organizer’s event page.
With running, there's a distance for every fitness level, a community at every start line, and nothing beats the feeling of crossing a finish line you trained for.
Running is an endurance sport that rewards consistency, and showing up every week compounds in ways that will surprise you.
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.
Hardest Ultra Marathon Relay | IRONHIKE OLYMPUS MONS - TRAIL BUDDY FLEX RELAY | Amicalola Falls State Park, Georgia | Team of 2 Athletes | 180 Miles | 84 Hour | Hardest Ultra on Earth | Run, Power Hike, Walk. | 72,480 feet of elevation gain and loss shared across two Mountain Athletes, up and down 604 stairs per lap for a total of 144,960 stairs on the AT Approach Trail staircase above Amicalola Falls. This is the hardest ultra on Earth, or Mars, built for buddying up. We are redefining race day.
Dec 9, 2026