50K Ultra Marathon Races

Your first ultra? Browse 50K races and get a custom training plan.

London Marathon

United Kingdom42.2km50m D+

New York City Marathon

United States42.2km210m D+

Tokyo Marathon

Japan42.2km40m D+

Chicago Marathon

United States42.2km50m D+

Boston Marathon

United States42.2km143m D+

Berlin Marathon

Germany42.2km35m D+

LA Marathon

United States42.2km250m D+

Honolulu Marathon

United States42.2km120m D+

Marine Corps Marathon

United States42.2km200m D+

Seoul Marathon

South Korea42.2km70m D+

Valencia Marathon

Spain42.2km20m D+

Barcelona Marathon

Spain42.2km75m D+

Monterosa Walserwaeg 43K

International43.0km

Ultra-Trail Xiamen by UTMB® 50K

International50.0km

HOKA Pacific Trails California 51K

International51.0km

Ultra-Trail Mount Yun by UTMB® 48K

International48.0km

Kaçkar 50K

International50.0km

Grindstone Running Festival 50K

International50.0km

Xtrail Kenting by UTMB® 50K

International50.0km

Trail Verbier St Bernard 43K

International43.0km

Kaçkar 44K

International44.0km

Malaysia Ultra-Trail 50K

International50.0km

Zugspitz Ultra Trail 44K

International44.0km

Kullamannen 50K

International50.0km

Patagonia Bariloche 50K

International50.0km

Arc of Attrition 50K

International50.0km

Trail 100 Andorra by UTMB® | Every trail tells a story in Andorra 50K

International50.0km

Grand Raid Ventoux 50K

International50.0km

Trail Verbier St Bernard 50K

International50.0km

Chianti Ultra Trail 50K

International50.0km

Wildstrubel 55K

International55.0km

Wildstrubel 50K

International50.0km

mozart 100 44K

International44.0km

Tenerife Bluetrail by UTMB® 50K

International50.0km

Ultra-Trail Australia 50K

International50.0km

Snowbasin 59K

International59.0km

Boréalys Mont-Tremblant by UTMB | New Ultra-Trail in Québec 50K

International50.0km

Snowbasin 50K

International50.0km

Ultra-Trail Mogan by UTMB® 50K

International50.0km

Rothrock 50K

International50.0km

TransLantau™ by UTMB® 52K

International52.0km

Desert RATS Trail Running Festival 50K

International50.0km

Speedgoat 50K

International50.0km

Desert RATS Trail Running Festival 48K

International48.0km

Ultra-Trail Australia 51K

International51.0km

Ultra-Trail Great Wall by UTMB® 53K

International53.0km

Ultra-Trail Great Wall by UTMB® 50K

International50.0km

Puerto Vallarta by UTMB® 53K

International53.0km

AMAZEAN JUNGLE THAILAND 50K

International50.0km

Chiangmai Thailand 50K

International50.0km

TransJeju 52K

International52.0km

MUT 50K

International50.0km

Ultra-Trail Kosciuszko 50K

International50.0km

TransJeju 50K

International50.0km

Ultra Trail Whistler 50K

International50.0km

HOKA UTMB Mont-Blanc 55K

International55.0km

Wildstrubel 42K

International42.0km

Bucovina Ultra Rocks 50K

*50.0km

Bucovina Ultra Rocks 48K

*48.0km

KAT100 50K

International50.0km

Torrencial Chile 44K

International44.0km

Quito Trail by UTMB® 54K

International54.0km

Trail of the Kings - Lake Toba 50K

International50.0km

Oh Meu Deus 50K

International50.0km

HOKA Val d'Aran by UTMB® 55K

International55.0km

Puglia 50K

International50.0km

HOKA Val d'Aran by UTMB® 50K

International50.0km

The Canyons Endurance Runs 50K

International50.0km

Trail Alsace 50K

International50.0km

Gauja Trail 50K

International50.0km

HOKA UTMB Mont-Blanc 57K

International57.0km

Zugspitz Ultra Trail 50K

International50.0km

Restonica Trail 50K

International50.0km

Athens Classic Marathon

Greece42.2km350m D+

Amsterdam Marathon

Netherlands42.2km15m D+

OCC — Orsières-Champex-Chamonix

France55.0km3,500m D+

Rome Marathon

Italy42.2km100m D+

Stockholm Marathon

Sweden42.2km130m D+

Copenhagen Marathon

Denmark42.2km25m D+

Twin Cities Marathon

United States42.2km150m D+

Vienna City Marathon

Austria42.2km60m D+

Houston Marathon

United States42.2km30m D+

Toronto Waterfront Marathon

Canada42.2km40m D+

Munich Marathon

Germany42.2km60m D+

Ottawa Marathon

Canada42.2km50m D+

OCC - Orsières-Champex-Chamonix

Switzerland55.0km3,500m D+

How to Train for a 50K

The 50K (31 miles) is the gateway to ultra running. It's only 8km more than a marathon but the mindset shift is massive — you're now an ultrarunner. Training takes 16-24 weeks with peak volume of 60-80km per week.

The Mental Shift

In a 50K, you'll walk the uphills, eat real food, and slow down significantly. This isn't a fast marathon plus extra — it's a different sport. Embrace the slower pace.

Vertical Training

Most 50Ks have significant elevation. Add hill repeats and long runs with elevation gain. Aim for 1000m+ of climbing per week at peak training.

Time on Feet

More important than distance: time on feet. A 4-hour hike/run combo is more valuable than a 25km flat road run. Back-to-back long weekends (Saturday long run + Sunday medium run) build ultra endurance.

Aid Station Strategy

Practice eating while moving. You'll need 200-300 calories per hour. Learn what the race provides at aid stations and practice with those foods.

Frequently Asked Questions

Can I run a 50K if I've done a marathon?

Yes — if you've finished a marathon, you have the base for a 50K. Add 12-16 weeks of ultra-specific training (hills, trails, nutrition practice).

How much walking is normal in a 50K?

Everyone walks in ultras. On steep uphills, power hiking is faster and more efficient than running. Budget 30-50% walking on hilly courses.

Get a Personalized 50K Training Plan

UltraCoach builds an AI-powered plan tailored to your fitness, schedule, and race goals. It adapts as you train.