The planning has already begun. Many of you will by now have chosen and signed up for your big race, with several others pencilled in as well.But just in case you're still wondering where to race, we present the TW guide to some of this year's best UK triathlons. Honestly, you're...

UK triathlons. Honestly, you're spoilt for choice, and that's just as it should be.  The Best: Spring RacesPicture credit: Mark HowellSubscribers can discover more triathlon races to try throughout 2011 in the full article. If you'd like to subscribe

the most enthusiastic hill runner. Take on over 1,500ft of ascent and two formidable slopes en route as legs meet their match on the Quantock Hills. If you don't fancy a bumpy 9.5mile challenge, there's also the option of the more undulating Hurtle 5K race

. In fact, it would be more useful to run wearing most of the kit and equipment. For pre-race competitions your best bet is the Newcastle Town Moor Marathon in chilly mid-November.Date: 10-18 DecemberPlace: Patriot Hills, AntarcticaCost: £8,180Get involved

– entries for the 2009 race have been open three days and already, half of the 1,800 places have been taken.How do I get hold of some of that beautiful yellow lycra?The team kit is custom-made to order.  The next order will be made in August

descents in the last few miles.FEES£10/£11, payable to Matlock AC by May 15. Entries accepted on day (£12).ENTRIES TOR Tassell, 10 The Causeway, Wirksworth, Derbyshire DE4 4DL (01629 823214)

Where and when?Sunday, December 14, StockportWhat is it?Since a new course was introduced two years ago, the Stockport 10 has grown and grown. It may lack scenary, but it's a slickly organised dash over a classic distance. The race starts

that was used in 2001.FEES£14/£15, payable to Manchester Marathon. No entries on dayENTRIES TOManchester Marathon, Belle Vue Leisure Centre, Pink Bank Lane, Longsight, Manchester M12 5GL (0161-231 1507)E-MAILleisure@manchester.gov.uk

for Performers (with predicted times below 1:45) and an afternoon session for Improvers (1:45 and upwards).The pancake-flat four-lap course skirted Dorney Lake and allowed the Super Six to put their race pace to the test as the big day approaches.

Where and when? Saturday, September, 27, Harwich, Essex.What is it? If you’re looking for an event with a more European flavour, this might fit the bill. With more than 500 runners making the trip from Holland, Belgium and Germany, the Discovery