Race Discovery
4x4x48
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2025 - 4x4x48

Burlington, Vermont, United States View on map
Jun 20, 2025 – Jun 22, 2025 (America/New_York local time)
Running

2025 distances

Running

4x4x48 Solo

This event starts with a 4 mile run at 4pm on Friday, June 20th - SUMMER SOLSTICE. It continues 4 hours later with another 4 mile run at 8pm... Then again at 12am on Saturday, and continuing with 4 miles every 4 hours for 12 total runs (48 hours, totaling 48 miles). The final run starts at 12pm on Sunday, June 22nd. The SOLO option is for athletes doing this event individually. WOW, what a test of grit! There will be limited indoor space for athletes to set up sleeping surfaces (indoor camping) with access to bathrooms and showers.

Jun 20, 2025 Ultra 4:00 PM
$150.00
Closed

4x4x48 Pair

The PAIR option is for athletes doing this with one other teammate. Each run must be completed in its entirety by a single teammate, but pairs can divvy up the running segments so they each run an equal number, or one runs more segments. If divided equally, each athlete will run 24 miles over 48 hours. There will be limited indoor space for athletes to set up sleeping surfaces (indoor camping) with access to bathrooms and showers.

Jun 20, 2025 38.6K 4:00 PM
$200.00
Closed

4x4x48 Team

The PAIR option is for athletes doing this with one other teammate. Each run must be completed in its entirety by a single teammate, but pairs can divvy up the running segments so they each run an equal number, or one runs more segments. If divided equally, each athlete will run 12 miles. There will be limited indoor space for athletes to set up sleeping surfaces (indoor camping) with access to bathrooms and showers.

Jun 20, 2025 19.3K 4:00 PM
$300.00
Closed

Race-day weather

Conditions on June 20, 2025 — historical Open-Meteo data.

Temp (°C)
Minimum temperature (recorded on race day) 16.8° / Maximum temperature (recorded on race day) 25.8°
Feels Like (°C)
Minimum feels like — heat index / wind chill (recorded on race day) 16.8° / Maximum feels like — heat index / wind chill (recorded on race day) 27.1°
Peak wind (km/h)
Strongest wind of the day (recorded on race day)
29.0
Precip (mm)
Precipitation over the day (recorded on race day)
6.5mm
Humidity
Mean relative humidity (recorded on race day)
71.0%
Sunrise
Sunrise at the start line on June 20, 2025 (EDT)
Sunset
Sunset at the start line on June 20, 2025 (EDT)
Daylight
Hours between sunrise and sunset on race day
15h 33m

The sun rises at 5:08 AM and sets at 8:41 PM local time (EDT) in Burlington on June 20, 2025 — 15h 33m of daylight.

Course

No course map published yet.

The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.

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Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.

  • Entries, prices, waves and inclusions — the event's official registration page
  • Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
  • Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
  • Comparisons and counts — Race Discovery calendar, 20 Burlington events

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