Team GB's three-time world champion Shanaze Reade put in a good performance in the time trial section of the Olympic BMX competition.
She finished fifth with a time of 39.368 seconds and places herself in a strong position going into the semi-finals on Friday, which is expected to be a popular event with large crowds, including many taking London getaways.
The leader of the event was the current world time-trial champion Caroline Buchanan of Australia with a time of 38.433 seconds, just 0.210secs ahead of New Zealand's Sarah Walker with Mariana Pajon of Colombia in third.
"It felt good. The first time you go out you're always going to be a bit rusty but it was great to compete in front of the home crowd," said Reade.
"I've been sitting around watching all the Olympic titles being won in the velodrome. I'm just glad to be out and competing myself."
Meanwhile, Great Britain men’s BMX rider Liam Phillips qualified in 12th place for the elimination round in a time of 38.719 seconds. There were doubts he would even compete in the Games after he broke his collarbone earlier in the year.
The BMX track is in the north of the Olympic Park and will see 48 riders competing in the men's and women's events to try to win medals. The track was significantly remodelled ahead of the Games following a test event in 2011. Organisers opted to make it more competitive and incorporate a number challenging jumps. It is believed that both the Dutch and American riders have benefited from building replica tracks in their home countries to practice on.