Thames Riverside 20

Old Deer Park, 187 Kew Rd, Richmond TW9 2AZ


Paced 20 mile race along the River Thames Towpath on Sunday 24th March 2024. Start at 8:30AM. Hosted by Clapham Chasers Running & Triathlon Club.

Start/finish location - Old Deer Park, Richmond.

Course Details:

Flat, traffic free and mostly off road route along the south side of River Thames. From Race HQ (start and finish) at Old Deer Park, runners complete a 20 mile course along the Thames towpath. The terrain varies and is uneven in stretches. Primarily gravel with mud in places and limited lengths of footpath. Normal road or trail shoes will be ideal.

Each mile point will be marked. In the event of unexpected maintenance or flooding on the route, well-marked short diversions may be introduced.

Runners will need to keep left at all times since the course will be open to the public who retain right of way.

CLICK - Course Map on the Gmap Pedometer website


Get up-to-date information @TR20info #TR20


After registering online and making payment, entrants will receive a confirmation email.

  • Race entries close at midnight 23/03/24.  
  • Race packs will be collected from the race site on the day.
  • No entries will be accepted on race day.
  • No refunds will be issued after close of race entries.

Run start, format and cut-off time:

Runners should arrive at race HQ NO LATER than 0730 Hrs. The race will start at 0830 Hrs prompt.

The first pace group will run at sub 7:00 mins per mile.

Dedicated pace groups will depart together (7:00, 7:30, 8:00, 8:30, 9:00, 9:30 and 10:00 mins per mile). Pacers will marhsal runners into pace groups prior to the race start.

Due to licence conditions, race cut-off time will be 1330 Hrs. Clapham Chasers are an inclusive club and run TR20 for runners of all levels. Runners who are unable to meet the race cut-off time, please email


There will be covered and supervised baggage storage at race HQ. Bags are left at runners' own risk. Race packs will include a bag tag which should be afixed prior to arrival at race HQ.


The course is straighforward and ideal for training. Marshals and direction arrows will be employed on the course. Runners should not leave the towpath unless directed to do so by a marshal or pacer.

Drink stations:

Cupped energy drinks and water will be provided every 3 miles along the route (3, 6, 9, 11, 14, 17) and at race HQ. Runners are welcome to refill drink bottles at any of these points.


All runners will start together at 8:30AM, with runners seeded at the start according to pace.


Portaloos provided at the start/finish area.

First Aiders:

Professsional and volunteer bicycle first aiders will be located on the course.  An ambulance crew will be located at race HQ. If runners are in need of assistance, at any time during the race, they should ask a fellow runner to inform the next marshal or cyclist. Runners must record emergency contact information on the reverse of their race numbers.


Results will be available online immediately after the race.


Prizes will be awarded to the first senior male, first senior female, first male veteran (40) and first female veteran (35). Runners are not entitled to more than one prize.

Race Licence:

The race is run under British Athletics (formerly UK Athletics) Rules and on licence number 2017-25987

Post Race Cakes:

As long established tradition dictates, to reward runners' magnificent efforts, the Clapham Chasers baking squad will be conjuring up a spread of delicious post race cakes for runners. Voluntary contributions will be donated to charity. 


In the interests of safety, the use of headphones by runners is not permitted. The Race Director reserves the right to disqualify any runner failing to observe this important restriction.


Clapham Chasers are responsible for keeping the course clean and litter reflects badly on the club and may affect our ability to organise TR20 in the future. Please do not litter the course with gel wrappers, drink bottles etc. This will result in disqualification.


Race HQ:

Old Deer Park, 187 Kew Rd, Richmond TW9 2AZ

Getting to TR20:

5 minute walk from Richmond Rail station. 

Parking on site opposite Old Deer Park. Please note this is a paid car park.