Road Running

Boulderthon

Road Running covering 5 km to 42.2 km in Boulder (Colorado, United States)

LocationBoulder, Colorado, United StatesShow on map(40.0267° N, 105.2581° W)
Date & StatusDate to be announcedDate TBA
Elevation gainUp to +190 m

Boulderthon is an endurance sporting event in Boulder, Colorado, US focused on Road Running. Key features include Nature & Off-Road, City Run.

The race program comprises 4 competitions, including Marathon (42.2 km, +190 m D+), Half Marathon (21.1 km, +95 m D+), 10 Km (10 km, +45 m D+), and 5 Km (5 km, +22 m D+). The exact date for the next edition is currently open and will be announced by the organizer. Official race regulations, course details, and registration information are provided on the organizer's website (boulderthon.org).

Official website
Boulderthon in Boulder (Work: "Alpine Ridge Trail Rocky Mountain NP 2024", Photo: Larry D. Moore, License: CC BY 4.0, Source: Wikimedia Commons)
"Alpine Ridge Trail Rocky Mountain NP 2024" · Photo: Larry D. Moore · Wikimedia CommonsCC BY 4.0
Cropped to 16:9 (960 × 540 px), WebP

Event characteristics

Nature & Off-RoadCity Run

Races & distances (4)

CompetitionDisciplineDistanceElevation gainAltitude rangeCourse typeCourse & profile
MarathonRoad Running42.2 km+190 m199 m - 279 mLoop courseRoute & profile
Half MarathonRoad Running21.1 km+95 m202 m - 242 mLoop courseRoute & profile
10 KmRoad Running10 km+45 m205 m - 224 mLoop courseRoute & profile
5 KmRoad Running5 km+22 m208 m - 217 mLoop courseRoute & profile
Course & Elevation Telemetry

Course route & map

Distance
42.2 km
Elevation gain
+190 m D+
Elevation loss
-190 m D-
Altitude range
199 m - 279 m
Gradient (Avg / Max)
0.9 % / 1.6 %
Course format
Loop course
42.2 km+190 m D+
Start (S)Finish (F)
N10203040FS40.0268° N, 105.2581° W

Elevation profile & course telemetry

Altitude from 199 m to 279 m above sea level (+190 m D+, -190 m D-)

Peak: 279 m·at 23.5 km·Ø 0.9 %
199 m226 m252 m279 m0 km8.4 km16.9 km25.3 km33.8 km42.2 km279 m
Event Information & Answers

Frequently asked questions (FAQ)

When and where does Boulderthon take place?

Boulderthon takes place in Boulder, Colorado, US (start area at coordinates 40.0267° N, 105.2581° W). The exact date for the next edition is currently open and will be announced by the organizer.

What races and distances are offered at Boulderthon?

The race program comprises 4 competitions, including Marathon (42.2 km, +190 m D+), Half Marathon (21.1 km, +95 m D+), 10 Km (10 km, +45 m D+), and 5 Km (5 km, +22 m D+). The competitions belong to Road Running.

What is the course layout and elevation profile for Boulderthon?

The main competition (Marathon over 42.2 km) is designed as a loop course featuring +190 m of elevation gain and -190 m of elevation loss, ranging between 199 m and 279 m above sea level. An interactive course map with route visualization, elevation profile, and GPX export is available in the course section on this page.

Where can I find registration and official race rules for Boulderthon?

Official race regulations, course details, and registration information are provided on the organizer's website (boulderthon.org).