Prudential RideLondon is the largest festival of cycling in the world.
More than 95,000 participants are expected to ride more than 3m miles over five events at this year's event - on Saturday August 1 and Sunday August 2.
The event combines the fun of a free family ride in central London with the excitement of watching the world's best professional cyclists (including Sir Bradley Wiggins and Laura Trott), and raises millions of pounds for good causes.
As well as professional cycling events locals can watch, there is a 100-mile challenge on closed roads, in which amateur cyclists can partake and raise money.
Here is all you need to know about the cycling festival, including timings, transport and weather:
Dates and timings
Saturday August 1
- Prudential RideLondon FreeCycle, 9am-4pm
- Prudential RideLondon Grand Prix, 5pm-7.30pm
Sunday August 2
- Prudential RideLondon Handcycle Classic, 8.30am
- Prudential RideLondon-Surrey 100, from 6am
- Prudential RideLondon-Surrey Classic, 1.30pm
All times are subject to change.
As well as thousands of amateur cyclists taking part in the RideLondon-Surrey 100 event, professional and celebrity cyclists will also be riding.
Professional cyclists include: Sir Bradley Wiggins, Laura Trott, Georgia Bronzini, André Greipel, Mark Cavendish, Mark Renshaw, Elia Viviani, Sep Vanmarcke, Tom Boonen, Philippe Gilbert, Adam Blythe, Ben Swift and more.
Road closures for central London (Saturday August 1) are as follows:
|Location||Road closure||Anticipated road re-opening|
|St Paul's Churchyard||4am||6pm|
|King Edward Street||6am||6pm|
|St Martin's Le Grand||6am||6pm|
|King William Street||6am||6pm|
|Queen Victoria Street||6am||6pm|
|New Fetter Lane||6am||6pm|
|Pall Mall East||7am||6pm|
|Lincoln's Inn Field||7am||6pm|
|Horse Guards Road||5am||7pm|
Road closures for central London (Sunday August 2) are as follows:
|Location||Road Closure||Anticipated road re-opening|
|Great Tower Street||4am||10.30pm|
|St James' Street||5am||10.45pm|
|New Fetter Lane||4am||10.30pm|
|Whitehall||Closed from 7am on Friday July 31||Open 6am on Monday August 3|
Road closures for west London (Sunday August 2) are as follows:
|Location||Road Closure||Anticipated road re-opening|
|Cromwell Road, Kensington||5am||2.30pm|
|Great West Road||5am||2.30pm|
|Hogarth Roundabout, Chiswick||5am||2.30pm|
|Burlington Lane / Great Chertsey Road||5am||2.30pm|
|New Kings Road, Fulham||7am||7.30pm|
|Kings Road, Chelsea||7am||7.30pm|
|Cheyne Walk, Chelsea||7am||7.30pm|
Spectators and local residents are advised to use public transport to get around on the race days; for more information or to plan your journey, head to TfL's dedicated Prudential RideLondon page.
Below is the route map for the RideLondon FreeCycle, which will take place on August 1 from 9am-4pm. The FreeCycle offers families the opportunity to experience the fun and freedom of cycling on traffic-free roads in central London.
Below is the route map for the RideLondon-Surrey Classic, which will take place on August 2 from 1.30pm. This race sees 150 of the world's top cyclists, made up of 25 teams of six riders each, tackling a 200km route through London and Surrey.
Below is the route map for the RideLondon-Surrey 100, which takes place on August 2 from 6am. The race starts in Queen Elizabeth Olympic Park, then follows a 100-mile route on closed roads through London and into Surrey. Sir Bradley Wiggins has confirmed he will take part in this event.
Where to watch
St James' Park: Head to St James's Park to watch the Grand Prix events on August 1.
The Handcycle Classic and London-Surrey Classic (August 2) will also partly take place at The Mall, so head to St James' Park to catch some celebrity action in the streets!
Wimbledon: A street party will take place on Wimbledon Hill Road with thousands of spectators expected to line the street and cheer the riders up the last climb on the route. There will be displays from the Extreme Wheels BMX team and the chance to try out a range of different bikes, plus live music, face painting, street entertainment and street food.
Kingston: Kingston is the only town on the route through which the cyclists ride twice.
The Kingston Bike Festival will provide a huge range of activities and events for all the family throughout the day. The Action Sports BMX Display Team will perform in the Market Place. There will also be a big screen here so that visitors can relax at the bars and cafes and watch all the action from BBC TV's coverage, with another big screen outside John Lewis.
Hampton Wick: This tiny suburb in south-west London is a short walk away from Kingston and will play host to fun entertainment such as music, dancing, pony rides, a carousel and fairground.
The events will be broadcast on BBC if you are unable to watch live and getwestlondon will also be live blogging on both race days.
For the best beer gardens and pubs to watch the races from, check out our RideLondon pub guide.
The weather is likely to be dry and fairly bright.
A spokeswoman for the Met Office told getwestlondon : "The weather will see an improving week and into the weekend.
"It will be a fairly dry weekend, with more sunshine on Saturday.
"On Saturday, there will be some patchy cloud and sunshine; the temperatures will be in the low 20s, perhaps 21C/22C. There may be some prolonged sunshine, which will bring the temperature up.
"It will be similar on Sunday; some more cloud around, but still staying warm.
"There will be some wind, but a chance of getting some warm air from the continent, so it may well creep up into the mid-20s to 25C.
"Overall, it will be a little cloudier on Sunday, but rain looks quite unlikely."
Will you be heading to the Prudential RideLondon festival this weekend? Send us your photos of the event at email@example.com or tweet @getwestlondonem.