With swimming, biking and running, a triathlon is one of the most complete tests of physical fitness and endurance an athlete can compete in.

The Crescent City Triathlon returns to Beachfront Park for its 30th year on Sunday, giving local athletes a chance to compete. Del Norters will have the opportunity to see not only how they stack up against each other across disciplines, but also against athletes from Medford, Eureka and Brookings, which nearly always has racers in attendance at the event.

Race director Russ Burnette said that the size of the race varies from year to year, with between 46 and 120 participants. This year, with 50 athletes already signed up for the triathlon, Burnette said he expects around 100 participants come Sunday.

Anyone interested in participating this year can sign up from 5andndash;7 p.m. on Saturday at Fred Endert Municipal Pool. Registration will also be held 7andndash;8:30 a.m. on Sunday before the event, though Burnette suggests that athletes sign up on Saturday "because it gets a little bit hectic on Sunday."

The Crescent City Triathlon is what is known as a sprint triathlon because of the relatively short distances of each event.

The triathlon will begin in heats of 12, starting in Fred Endert Municipal Pool at 8:30 a.m., where racers will swim 500 yards (10 laps) before heading outside to bike a 12-mile course up to the high school, over to Point St. George and back, followed by a 3.1-mile run.

The official "Olympic distance" triathlon involves a 0.93-mile swim, a 25-mile bike ride and a 6.2-mile run. The famous "Ironman Triathlon" athletes swim 2.4 miles, bike 112 miles and run 26.2 miles.

"Being that this is sprint, it is kind of an entry-level race," Burnette said. "The limiting part is probably the swim. If you can't swim 10 laps, that kind of scares people off. But the bike and the run are pretty standard. Pretty much anybody can do those."

For people who are not willing or able to do the swim, there will also be an adult duathlon with just running and biking.

There is also a relay option at the triathlon, where participants team up in groups of two or three to tackle the three events.

Kids ages 5andndash;12 years old are also welcome to join the fun in a mini-triathlon with distances ranging from 1 to 2 laps swimming, 1 to 6 miles bike riding and andfrac14; mile to 1 mile running, depending on the age group.

The cost to sign up for the event is $60 for the adult triathlon or $40 per relay participant and $25 for the kids triathlon. Proceeds will benefit the Del Norte High School Scholarship Fund.

Anyone is also invited to purchase raffle tickets for a Trek bicycle, donated by Back Country Bicycles. Tickets can be purchased in the store until Friday or at the triathlon on Sunday.

All participants will receive a medal, a beanie and a drawstring backpack. Awards will also be distributed to each of the top three finishers in age groups of five-year increments up to 60 years old. There will also be an overall male and female winner named as well as an award for the overall male and female masters (over 40 years old).

Race and split times will be measured by AA Sports, which will provide each of the runners with a chipped bracelet to track their progress.