Bar injury or accident, Chris Estwanik and wife Ashley will almost be certainly crowned the 2012 May 24 Half-Marathon champions tomorrow.Neither in the men’s nor women’s field are there any runners who can match their speed or endurance. They’ve shown that before and are unlikely to be tested in the latest edition of the race, which Bermudians consider by far the most prestigious on the the racing calendar.Chris will target his fifth successive victory, a feat previously achieved by only Ed Sherlock and Kavin Smith, who also holds the record of nine wins.The former American track star will also be looking to break his own course record as will Ashley who returns to the field after skipping the race last year as she was pregnant.Neither have been beaten whenever they have featured in the race.And it should be another family affair tomorrow in front of what will be a crowd of thousands lining the roads.With Lamont Marshall deciding not to enter as he makes a final push for the London Olympics, Estwanik should have things all his own way.Marshall might have been his only serious contender.Now the young Sean Trott, who placed finished third last year, has the chance to go one better. But it would be remarkable should he find the kind of form needed to overhaul the clear race favourite.Policeman Stephen Allan has been a consistent winner this year whenever Estwanik hasn’t entered but he too will find it too challenging over the 13.1 mile distance to add his name to the Derby honours list.On the women’s side, Jenny Alen may be the best bet to run down Ashley but after last year’s disappointment when she collapsed through heat exhaustion just a mile from the finish line, she may take a more cautious approach and would be happy to take second.Last year’s champion, Deon Breary, would have been eager to beat Alen, and perhaps Ashley, but has been forced out by injury.Heat and humidity, which traditionally seem to rise on every May 24 race day, torpedoed Alen’s hopes last year and that appears to be the only barrier that stands in the way of another Estwanik double, although those suffocating conditions haven’t bothered the pair in the past.The forecast for tomorrow is sunny with possible showers and a high of 74 degrees. If that forecast proves correct and on this particular day it often isn’t the weather shoudln’t be a factor.But plenty have suffered on the hills that separate Somerset from Hamilton and those in the field for the first time tomorrow will discover it’s a far more daunting challenge they could have ever imagined.As Alen commented in an interview this week, to finish is an accomplishment in itself.And those who do find it all too much . . . there’s always next year.