About the Oxon 40/20

The 2021 event is planned for May 1st 2021 - All details are provisional and subject to change, depending on Covid-19 restrictions and advice. It is likely there will be changes to the start procedure and catering; be prepared to bring all your own food. Please monitor this page for updates and further details of the event.

  • The event continues to be in the scenic Chilterns, including Bluebell woods.
  • The 20-mile route is an introduction to LDWA Challenge Events and should be within the remit of most regular walkers.
  • The 40-mile route includes significant hills and is a challenge to complete within the time limit.
  • There is a firm approach to mandatory kit and mass start times.
  • Full details are available below.

We do not publish results in time order or with finishing positions in keeping with the official LDWA policy that challenge events are not races - there is no 'winner'! There's a complete spreadsheet of the results on the Past Results page for those wishing to do their own analysis.

Route Descriptions

See the Route Descriptions page to download route descriptions for editions of the Oxon 40/20.

Results for previous events

See the Past Results page for previous years' results.


Please email the Oxon 40/20 Co-ordinator.


Please ensure you have read and fully understand the information below BEFORE you formally apply via SiEntries.

The Event

The aim is to complete, on foot, a defined route of approximately 40 or 20 miles within a maximum time period of 13.5 hours (40 miles) or 11.5 hours (20 miles) on Saturday 1st May 2021. Strugglers on the 40 (hilly!) route will have the option of downgrading to approximately 33 miles at the last checkpoint.

Walkers and runners are welcome.

Route start times differ as shown below; however, all entrants MUST finish by 20:30.

Conditions of Entry

By entering via SiEntries you are considered to have read and agreed to all of the event rules. The event rules are the various conditions and requirements as laid out within this page.

You are to provide the organisers with your mobile phone contact number and the phone must be carried, charged and switched on during the event.

Entrants for the longer distance must be over 18 on the day of the event. For the shorter distance any person under 18 years of age must have the written consent and be accompanied on the event by a parent or guardian. At registration on the day the written consent is to be submitted and the organisers made aware of both the junior and the escorting parent or guardian.

The organisers reserve the right to vary the route for any reason, in which case you will be informed as appropriate.

The organisers reserve the right to carry out a kit check at any time during the event. Anyone failing to comply with ALL the mandatory kit will be retired.

If the event is cancelled (at any point in the planning and delivery period) for any reason the organisers will do their best to contact entrants using the details provided. The Organisers will put a notice on the event website and main LDWA website and entrants are strongly recommended to check this before departure. Cancellation of the event will be at the discretion of the organisers and entry fees will be refunded less a proportional amount for unavoidable costs incurred

There will be no refund if you cancel and/or withdraw from the event. Each entrant must:

  • Complete the event exclusively on foot.
  • Follow the route description provided, including any late changes notified at the start or en-route by marshals; get your time recorded and tally card clipped at each checkpoint and hand your card in at HQ on completion or HQ or CP if you retire.
  • Pass through the checkpoints in order. In the event that you deviate from the route you must get back on the route by the shortest practical means without trespassing on private property. Deliberate deviation from the route to gain advantage will result in disqualification.
  • Obey directions given by marshals
  • Make yourself aware of, and comply with, the Countryside Code at all times and do nothing to bring the LDWA into disrepute.

Any person who is identified as marking the route will be disqualified.

No dogs except registered assistance dogs with appropriate third-party insurance permitted by prior arrangement. They must be kept on leads at all times and dogs are not allowed in any of the indoor halls (a condition of our hire). Dogs are not covered by LDWA insurance.

In all matters connected with the event the decision of the marshals is final.

Entry: Fees / Certificates / Results

Online application and payment is via SiEntries. The date on which SiEntries will open will be on our website. Entries will be acknowledged by email. NO postal entry, NO entry on the day, NO substitution, NO refunds.

The number of entries will be limited on a ‘first-come first-served’ basis. Entries close when the limit is reached or 18th April 2021, whichever is sooner. Any subsequent requests for places once the entry limit / closing date is reached will be ignored. The entrant fee for either route will be at most £15 for LDWA members, £20 for non-members.

Entry fee may include drinks, sandwiches, cakes etc. at checkpoints and meal at the finish (depending on circumstances) and transport for retirees. (Please carry any extra food and drink you might need to supplement that provided at the checkpoints.).

Certificates will be awarded to those who complete their chosen route within the time limit. These can be collected from the finish table on the day. Oxon 40/20 badges will be on sale.

Results will be published on the Thames Valley website after the event concludes at Past Results

On the Day – 1st May 2021

HQ Venue and Car Parking

HQ Venue. Start and finish is at Longburrow Hall, Park Lane, Stokenchurch, Bucks, HP14 3TQ. GR SU760965. Please note muddy shoes or boots must not be worn inside the Hall. Changing rooms, toilets and showers may be available. Baggage may be left at the HQ at your own risk for the duration of the event. The organisers accept absolutely no responsibility for any baggage and contents left at HQ. All bags must be removed by 21:00 on the day of the event.

Sleeping at the HQ venue is not possible.

Car parking outside Longburrow Hall is for marshals only. Entrants’ car parking is available nearby – from M40 J5 proceed to Stokenchurch along the A40. Within 300m as you enter the village you will see the car park marshals who will direct you to the parking spaces. Marshals will be on duty from 06:15. The Marshals will direct you to Longburrow Hall, a distance of about 750m; you should allow 20 minutes to get to registration then to the start in the centre of the village. Space is extremely limited; please car share where possible.

Registration and Start

The three starts are listed below; each will be a mass start. You MUST not commence prior to the relevant start time.

Entrant numbers will be allocated on the day.

You must register prior to the relevant start. A formal briefing will be given at each start.

Registration commences from 06:30. (No access to the Hall prior to this time.)

40-mile walkers only: start 07:00.

40-mile fast walkers, joggers / runners (average pace faster than 4.5mph up to a maximum of 6mph): start 08:00.

20-mile walkers and runners: start 09:00.

Checkpoint opening times are based on these times and are stated on the Route Description so plan your day accordingly. You will not be allowed access to a checkpoint other than during the official opening times. You must finish by 20:30, so walkers on the 40-mile route should start at 07:00 sharp. Entrants who appear likely to finish late will be retired at the last checkpoint.

Any entrant who expects to complete the event at an average pace greater than 6mph is to contact the organiser to discuss a potentially later start time. However you will still need to comply with the event checkpoint opening and closing times.

Route Description

You MUST bring along a paper copy of the route description, which can be downloaded from the Thames Valley website from Thursday 15th April 2021. You are reminded the checkpoint opening times are strictly adhered to.

Entrants who wish to reconnoitre the route should note that the route may be subject to late alteration.


  • Paper copy of the Route Description
  • Whistle
  • Basic First Aid kit including blister plasters
  • Suitable footwear in good condition
  • Waterproofs (emergency poncho or survival bag is sufficient)
  • Compass (Magnetic, GPS or Smartphone, providing fully charged batteries)
  • Mug or similar drink container (none will be provided)
  • Emergency food & drink
  • Map(s) as specified below:
    • OS Landranger 165 (Aylesbury and Leighton Buzzard) and 175 (Reading and Windsor) 1:50,000
    • OR OS Explorer 171 (Chiltern Hills West) 1:25,000.
    • OR Computer-generated versions of these maps printed in colour at a scale of not less than 1:50,000 which must be within a waterproof covering and at least two kilometres either side of the route
    • OR Map(s) in electronic format (GPS) with an adequate power supply. If using a Smartphone you should carry a separate fully charged mobile phone for contact in an emergency.
  • In addition your clothing, both worn and carried, should be suitable taking into account the prevailing weather conditions and the forecast for the day.

Retirement / Timed Out

If you need to retire before finishing the route you must do so at a checkpoint by informing a marshal and handing in your tally card. They will arrange transport to get you back to the finish. An emergency telephone number will be given in the route description should you be unable to get to a checkpoint.

Checkpoint marshals are entitled to retire entrant(s) who in their opinion are behind schedule or who appear to show signs of distress going beyond normal fatigue.

Entrant(s) arriving at a checkpoint after the official closing time will be timed out and retired. They must remain there until transported back to HQ.

Entrants found not to be in possession of any item of the mandatory equipment will be retired.

Under no circumstances should anyone leave the event or retire without ensuring the event organisers are informed and their tally card handed in at a CP or HQ.

Privacy, Data Protection and Personal Information

The organisers need to store entrant information on a computer for operational and safety reasons. This is a pre-condition of entry and by entering you agree to this temporary storage. The information will be held by the team for planning and event management. It will be erased after any report and results have been published.

“I understand that the personal information submitted as part of this entry will be held by the event organisers for a period of up to three years after the event is held for the purposes of managing this event only. I further understand that photographs are likely to be taken at the event, which may be featured in Strider magazine or on LDWA websites. In addition, I understand that Summary Information* may be published immediately and may be held in perpetuity for the purposes of providing a record of the event. I will have the right to request that all my personal Summary Information is anonymised.”

* Summary Information is limited to the participant’s name, age, gender, postal town, email address, LDWA membership number, event name and date, distance covered, time recorded as well as any other linked walking achievement.


By entering via SiEntries, an entrant is considered to have agreed to the above statement and read and agreed to all of the event rules, conditions of entry, and conduct expected during the event.