Course format
Trail race with mixed terrain
RacesReviewed / Race Intelligence
Iditarod Trail Invitational 100 Mile
Run the first 100 miles of the legendary Iditarod Trail, where Arctic conditions, frozen rivers, and Alaskan wilderness combine into the ultimate endurance test. This entry-level version of one of the world's most extreme races takes you from Knik Lake into remote backcountry checkpoints, challenging runners to cover roughly two marathons per day across unforgiving terrain. Not for the faint of heart — but for those who answer the call of the Last Frontier, it's a life-defining 100 miles.
RegisterOpen signupitialaska.comWebsiteOfficial race siteitialaska.comLocationAnchorage, AKRace start area
Jump to
Elevation profile
Mixed terrain profile
Pressure point
Race-morning execution
Weather bias
Weather usually manageable
Free training plan
Build a free 100 Mile plan for this race.
Keep race research first. When you want it, open a quick planner that uses the selected distance, the selected race date, and the course itself.
This distance needs a confirmed race date before we can build a date-aware plan.
Course Profile
Iditarod Trail Invitational 100 Mile course overview
This course section is built from a lighter course overview so you can understand how the race is likely to run.
Synced course focus
Mid-course
Mile 1.0 · 0 ft · Course intelligence will improve as GPX and logistics data land.
Course trace
This course view focuses on the best route information currently available.
Pressure model
Pressure points highlight where pacing or effort may change during the race.
What comes next
Use the course, weather, logistics, and reviews together to build your race-day plan.
Difficulty Meter
100 Mile race demand
67/100
- Course detail
- Moderate
- Weather detail
- Historical + forecast
- Race-day detail
- Moderate
- Weather view
- Live forecast
Weather read
Strong tailwind assist
Route-aligned wind gives you a quick feel for how the day may race before you dig into the full weather section.
Jump to weather analysisWeather Analysis
Iditarod Trail Invitational 100 Mile weather outlook
Weather blends the live forecast with the race's historical weather patterns to help you plan.
Route-aligned wind
+5.0 mph
Interpretation
Strong tailwind assist
NOAA race-window forecast is live. Wind is scored relative to the course bearing where possible.
Estimated weather effect
+0.14%
Heuristic read
Close to neutral weather
Help score
-3
Historical profile
Historically close to neutral
Based on 7 years of race-weekend weather in the archive.
Tailwind years
0%
Headwind years
0%
Helpful weather
0%
Forecasts use current race-area weather, and history looks at past race-weekend conditions to show what runners have typically faced.
Weather history
2025 race-weekend conditions
Race date
Mar 15, 2025
Avg temperature
31.4F
Avg wind
4.0 mph
Aligned wind
N/A
Historical weather pending
+0.22% estimated finish-time effect · 12 hourly observationsRace zone
54F
Chance Rain Showers
5.0 mph · SCity center
54F
Chance Rain Showers
5.0 mph · SFinish area
54F
Chance Rain Showers
5.0 mph · SCourse Breakdown
Where the race starts costing more
Active segment
Middle rhythm
This segment is a layout-safe placeholder until richer course data arrives.
Race-Day Logistics
Iditarod Trail Invitational 100 Mile race-day logistics
Race weekend
7 recorded years
The basic race structure is in place for planning.
Distance options
1 distance
This page can show the event correctly even when some race-day detail is still light.
Race-day planning
More details coming
Packet pickup, parking, support flow, and reunion details may still be limited.
Course Map
Route shape, city context, and key course moments in one view.
Map overview
This map gives you a race-area view and course orientation even when the full route is not available.
Highlighted point
Mid-course
Course intelligence will improve as GPX and logistics data land.
What to watch
Use this map to get your bearings before race day and understand the general shape of the course area.
Course coverage
Detailed route geometry and extra overlays may still be limited for this race.
Why it matters
Anchorage, AK should still be easy to plan around, even when some course details are lighter than others.
Planning
Use the 100 Mile at Iditarod Trail Invitational 100 Mile as a planning target rather than a qualification race.
Entry posture
Open entry
There is no qualification signal in the current event record.
Race framing
100 Mile planning
The page emphasizes course, logistics, and weather rather than qualification standards.
Race History
Race history overview
Past editions tracked
7
Recorded race years
ArchiveCurrent route view
Available
100 Mile
CurrentBenchmarks
Growing archive
More historical context will be added here as the archive grows
In progressReview Radar
Runner signal for Iditarod Trail Invitational 100 Mile
Course
93/100
Logistics
43/100
Crowd support
47/100
Aid stations
67/100
Finish area
60/100
Recommend
93/100
Common questions