MR25 Ultramarathon 2025

2025 MR25 ULTRAMARATHON EVENT INFO & REGISTRATION

MR25 is proud to present the 2025 edition of its iconic Ultramarathon. Join us for this unforgettable dawn-to-dusk challenge along the scenic trails of MacRitchie Reservoir!

PARTICIPANT ENTITLEMENTS
  • An event singlet for all participants.
  • A FINISHER T-shirt and a bottle of Nature’s Best SuperActiv T2 Collagen (60 caps) upon completing 5 loops in a single day (7am to 7pm) during the Qualifying Race from 1 June 2025 to 30 November 2025.

(Collection Date/Time/Venue: 2 November (8am to 10am) and 28 December 2025 (7am to 7pm) at a venue that will be announced later. One representative can collect on behalf of a few runners. Bring screenshot(s) of confirmation email)

EVENT CATEGORIES & REGISTRATION FEES

Early Bird (last day on 31 August 2025):
(a) Men’s Closed (MR25 members) – $40
(b) Women’s Closed (MR25 members) – $40
(c) Men’s Open (non-members) – $70
(d) Women’s Open (non-members) – $70

Late Registration (1 September – 30 November 2025):
(a) Men’s Closed (MR25 members) – $70
(b) Women’s Closed (MR25 members) – $70
(c) Men’s Open (non-members) – $110
(d) Women’s Open (non-members) – $110

PAYMENT MODE
  • PayNow to MR25 UEN: S76SS0057HUOB
  • Bank Transfer to UOB: 3533109673
PRIZES FOR FINALISTS*

RACE RULES & REGULATIONS

(I) Qualifying Race (1 June to 30 November 2025 – Virtual):

Complete most number of 10.5km loops (anti-clockwise) at MacRitchie from 1 June to 30 November 2025 from 7am to 7pm along a designated race route^ at MacRitchie Reservoir. Results are based on the best attempt during the period in a single day and will be ranked based on the following criteria (in order of priority):

  1. Number of 10.5 km loops completed (more loops ranked higher)
  2. Attempt date (earlier date attempts ranked higher)
  3. Time taken (faster elapsed time ranked higher) – i.e., start of first run to end of last run
  • Race is self-supported.
  • Unlimited attempts on any day during the qualifying race period.
  • Start of run must only start at/after 7am and last run must end before 7pm.
  • Complete 5 or more loops to achieve ‘FINISHER’ status.
  • Results of Strava^ must be submitted by 2359hrs on the day of attempt based on google forms submission (late uploads will not be processed).
  • Leaderboard will be updated weekly from 1 June to 30 November 2025 and be posted by 2359hrs on the following Wednesday.

The top 6 participants from each category will advance to the Finals, where they will join a select group of invited guests and participants, making up a total of no more than 30 finalists. In the event of insufficient qualifiers in any category, the Organizing Committee reserves the right to select from among the eligible participants. Finalists will be notified by email by 10 December 2025 (race location and route of the Finals will be disclosed).

(^Details on the designated route, rules and instructions for the uploading results via Strava will be sent to you after registration. For your safety as well as the safety of other visitors, please refrain from running while on the boardwalk)

(II) Finals (28 December 2025, Sunday – Physical):

  • Race timing from 7am to 7pm (first loop must be on/after 7am and last loop must complete before 7pm).
  • Participants to complete most number of loops along the designated race route^ in the quickest time.
  • To be considered a ‘Finisher’ in the finals, participants must complete at least 5 loops.

The Organizing Committee reserves the right to judge and make final decisions on any aspects of the rules not explicitly outlined in the event information and registration form.  

For queries, contact us at: ask@mr25.org.sg

Link to registration form: https://docs.google.com/forms/d/e/1FAIpQLSeqEqASVBW5UzaEMMe5f_pI4tS8zgvapQvopRq4Fe0AnxXuRQ/viewform

 

Age-Graded Performance Index – Apr 2025

MR25 5km Time Trial Age-graded Performance Index (API) Leaderboard – April 2025

New 5KM Time Trial API Leaderboard Update!

With the April 5KM Time Trial now completed, we have wrapped up two full cycles of the MR25 Age-Graded Performance Index Leaderboard, first introduced in June 2023 — that’s 12 time trials and over 200 entries!

We are excited to unveil the latest update, which now features separate leaderboards for the 5KM and 4.8KM Time Trial courses. This change reflects the growing size of the leaderboard and introduces a route-independent ranking system that accounts for the slight differences in distance and layout between our standard men’s 5KM and women’s 4.8KM routes.

Here is the latest update:




For runners not aware, our club introduced this 5km Age-graded Performance Index Leaderboard from June 2023 5km Time Trial to generate some fun and friendly competitions among participants of our bimonthly 5km Time Trial.

The index accounts for age and gender differences using internationally recognised performance standards — enabling runners of all ages and genders to compete on a more level playing field and enjoy the challenge together.

Join us to see where you stand!

Age-Graded Performance Index – Feb 2025

MR25 5km Time Trial Age-graded Performance Index (API) Leaderboard – February 2025

Almost 200 Runners Have Stepped Up to the Challenge!

Another year, another leap in performance! Tony Seakins shatters records yet again on our MR25 5kmTime-Trial Leaderboard. Higher scores ahead!

Here is the latest update:





For runners not aware, our club introduced this 5km Age-graded Performance Index Leaderboard from June 2023 5km Time Trial to generate some fun and friendly competitions among participants of our bimonthly 5km Time Trial.

The MR25 Age-graded Performance Index attempts to normalize the physiological difference in performance due to gender and age. It is constructed based on statistics obtained from the performances of runners internationally. Ranking of this score allows competition across all age groups and both genders, adding some fun to the competition. (The leaderboard will be posted on our website https://mr25.org.sg/2025/02/16/age-graded-performance-index-feb-2025/ )

Join us to see where you stand!