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10 Staines Road, Twickenham, TW2 5AH

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The Chilterns beast

Ride Overview

Tackle the Chilterns Beast – 6 climbs on the 100km medium route, 9 climbs on the 160km long route on beautiful Chilterns lanes. Starting near Chinnor, the Beast packs a punch from the off taking in the sharp climbs near Princess Risborough early on and rarely easing off!

Long Route: 161km, 2291m
Medium Route: 105km, 1451m
Long Route Difficulty 4/5
Medium Route Difficulty 3/5

Key Climbs:

Hill Road –  1.9km, 6.3% average gradient
Chinnor Hill – 1.7km,  6.4%
Dunsmore Hill – 0.8km,  7.6%
Whiteleaf – 1.4km, 9.4%
Wardrobes – 1.1km, 8.9%
Chipps Hill –  1km, 6.7%

Countdown to July 17th

Ride Highlights

From the Thames to the heart of the Chilterns: Discover the quiet country lanes of the Chilterns


Tackle the Top 100 Whiteleaf climb: 1.4km, average almost 10%, Whiteleaf is the headline hill in a route packed with punchy climbs


Action packed route: The long route features 9 major climbs – you are never far from the next climb or descent.

The Route

The Chilterns Beast: July 17th 2021

Pick between the 161km long route or 105km medium route in the beautiful Chilterns. Part of our “Beast” Series, these rides are suitable for most regular cyclists – on this route both medium & long routes are packed with tough climbs, miles of glorious country lanes and some sweeping descents. You will definitely have earned your medal at the end!

Start Time: From 7.30am

Finish Time: Ride Village closes at 6pm

Start / Finish Location: Watlington

Long Route

Long Route: 161km, 2291m

The long route is a super punchy day out in the Chilterns. After a rolling first 35km to get the legs ready, the middle 110km is packed with climbs of all shapes and sizes from the very steep Whiteleaf to the gradual Ivinghoe Beacon. The extra loop on the long route from Princess Risborough towards Wendover and beyond is very challenging with almost no flat sections.

After another lumpy section through beautiful backroads, we skirt round Henley for a lovely 15km rolling finish.

Ride Difficulty: 3/5

Medium Route

Medium Route: 105km, 1451m

A lumpy but rewarding 100km route in the heart of the Chilterns .We set out near the Thames in Goring Heath and roll north to Watlington where the climbing really begins. The bulk of the elevation is in the punchy middle 60km of this route as we head over Hill Road, Chinnor Hill and the very steep climbs in Princess Risborough including the Top 100 climb of Whiteleaf.

We then head back home through stunning backroads before a lovely rolling last 15km and a well earned medal at the end.

Physical Difficulty: 2/5


Is the route marked?

Yes, the route is fully marked. We also suggest bringing a bike GPS to follow as well, we will send you a GPX file with the route one week before the ride.

How do I find out my start time?

Riders start in groups of maximum 6 at a time. We will send you an email after you have booked to choose your start time between 8am and 10am, if you are riding with a friend you can choose to start with them.

Where is the start / finish?

The ride starts and finishes in Watlington. There is free parking onsite as well as a toilets & refreshments.

What happens if I have a mechanical / accident?

It is important you prepare properly ensuring your bike is in good condition & physically ready for the challenge. If you have an accident or mechanical, we have support at the feeds and sweep van at the back.

What shall I pack with me for the ride?

You need to have two water bottle, basic kit to repair punctures, inner tubes & riding with a helmet is compulsory. Our feed stops have water, cake, fruit & bars.

Do I get a medal at the finish?

Yes, when you finish the ride you will go through the finish line and get your hard earned UK’s Hardest Hundred medal.


Finishers Medal

Get to the finish and collect your well earned UK's Hardest Hundred Medal

Feed Stops

We have feed stops approx every 40 to 50kms with fruit, cakes, water, hydration tabs & sports bars / gels.

Fully marked route & timing chips

Focus just the stunning views & thrilling ride. The route is marked out all the way & you can check your time for the route at the end.

Race village at the finish

After an epic ride, grab a coffee, cake & more from the food trucks at the end. Free parking for the day & toilets & also included in your entry.

Additional information

Route Type

Long Route, Medium Route

The Chilterns Beast


SKU: 22HHS0717 Category: