Chennai Trail Marathon

Race completed

50 km Distance

not publishedn/a Climbing

2.5 est Grit · Entry level

Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.

13.2082° N, 80.1489° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 7.5 hours 9:00 min/km average. Tight. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 50K cut-offs we track. Measured against 1065 races of the same distance. Cut-off calculator →

Field size ~37 Small. Long stretches with nobody in sight.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, September

Daytime high 32°C

Night low 25°C

Rainfall Showers likely

Daylight 12 h 20 m of light

Regional 2001-2020 average for September — NASA POWER, grid elevation 49 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	37	Raj Kumar · 05:11:03	—
2017	50km	59	Sampathkumar Subramanian · 04:47:34	Aakriti Sanjeev Verma · 06:40:12
2016	50km	40	Bipul Kumar · 04:45:00	Divine Divine · 06:56:00
2014	50km	56	Bli Bosco · 04:41:00	Shikha Pahwa · 05:34:00

The field shrank 37% between 2017 (59) and 2025 (37). 0% of the 2025 field were women.

DUV results for the 2025 edition (50km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

gear With road terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 50 km of road.

Trail Running Shoes 50 km of road — cushioning that is still there in the last quarter.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 50 km, without the bounce.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

Adidas

Adizero Evo SL

RunRepeat found the Adidas Adizero Evo SL to be lightweight and well-cushioned, with a 100% Lightstrike Pro midsole and world-class Continental outsole. irunfar…

★★★★★ 4.7

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Naked

Running Band

Minimalist waist-mounted running band. Ultra-light alternative to a vest for shorter races.

$60 ★★★★☆ 4.3

Suunto

Vertical

Titanium GPS watch with solar charging, offline maps, and 140-hour GPS battery.

$630 ★★★★★ 4.5

All gear guides →

Overview

Organised by the Chennai Trekking Club in Cholavaram, India, the Chennai Trail Marathon 50k presented runners with a demanding 7.5-hour time limit. That cut-off is tighter than 91% of 50k races and more generous than only 9%, requiring participants to maintain a sustained pace of at least 9 minutes per kilometer across the full distance.

The route routed competitors through diverse terrain around the lake, traversing forests, canyons, dams, paddies, cashew plantations, and grasslands. With 37 finishers in 2025, the event featured a mid-sized lineup—bigger than 49% of 50k fields and smaller than 50%—meaning runners spent long stretches navigating the trail without large packs nearby.

Similar races

Other 50K road ultras, closest in distance first.