Department of Conservation staff Ed Astin and Gavin Mason spent yesterday working to clear the trail of slips and swamped sections.
"The river has dropped substantially. We're filling in washed-out ruts, laying gravel, and also clearing up a couple of minor slips which have come down," Mason said.
Parts of a 3km section of the track were submerged by the Clutha River after several days of heavy rain in the Lake Wanaka catchment last week.
The swollen headwaters forced Challenge Wanaka organisers to prepare a contingency plan for a section of the triathlon's marathon leg, which followed the flood-affected trail.
Challenge Wanaka race director Victoria Murray-Orr has said Doc is responsible for approving the track's use for Saturday's race.
Doc Wanaka area manager Paul Hellebrekers said the condition of the Outlet Track was "promising".
"It's pretty good along the trail and we will be working through [today] to get it back in shape," he said.
A final call on the trail being used for the triathlon run leg would be made today.
Meanwhile, race organisers are still seeking volunteers to help out on race day, a "job" that several stalwart helpers say is one of the best around.
Gary Tweedie and Mark Gould have helped at every Challenge Wanaka since the long-distance triathlon began in 2005.
Tweedie also competed as a team swimmer in the first two races, before donning his volunteer's cap later in the day to help out around the course.
The pair were busy setting up the athletes' transition area at the Pembroke Park race finishing area and headquarters yesterday, alongside Murray Sheppard.
Gould said he enjoyed being involved in the event alongside other "close-knit community-minded" people.
Setting up and organising tents, stands, bike racks and athlete-support facilities was like a full-time job before the event, he said.
Ms Murray-Orr said about 54 people were still needed to fill the different volunteer roles on race day.
The backing of race-day volunteers was a crucial ingredient that boosted the community spirit of Challenge Wanaka and was a "massive" encouragement cited by all of the athletes, she told Radio Wanaka.
"It blows me away every year how generous people are with their time.
"Without volunteers, the athletes wouldn't be able to race, and they are always grateful for the support which our helpers show them during race day," she said.
