Pi-Day river run on tap: The Lawrence Trail Hawks will host the “Pi-Day River Rotation Half Marathon” on Saturday on the Kansas River trail system. The race marks Pi Day, a March 14 holiday held in honor of the mathematical constant 3.1415. The race will be held the first Saturday following Pi Day. The half marathon trail race will begin and end by the Kansas River Trails trailhead, just off Eighth and Oak streets in North Lawrence. More information is available online at www.lawrencetrailhawks.com.

Softball openings: The DC Attack fastpitch softball organization has one opening for its 12-and-under team, two openings for the 14-and-under squad and one opening for the 18-and-under team. Anybody interested in trying out should contact Steve Wiggins at 423-0949 or Bruce Burton at (913) 915-6315.

Girls fast pitch: The Lawrence Parks and Recreation Department is accepting registration for the 2011 Lawrence Girls Fast Pitch Softball Summer Leagues through April 1. 8-U (coach pitch) teams and leagues will be formed by individual registrations from schools and grades. 8-U players must be 8 years old or younger on Jan. 1, 2011. Participation fee is $65. The 10-U, 12-U, 14-U and 16-U Lawrence Girls Fast Pitch Softball Summer Leagues are now taking team registration for the 2011 season, through April 1. Player’s eligibility is determined by age as of Jan. 1, 2011. Team registration is $900. For more information and registration forms, please contact Duane Peterson at 832-7940 or go to www.lgfpa.com and/or www.lprd.org. Click on Youth Sports and then on Softball.

Softball tourney: The City of Lawrence Parks and Recreation, in conjunction with Lawrence Softball Umpire Association, will host the Lawrence Pre-season Girls 12-Under Class B-C Fast Pitch Invitational Tournament on April 30 and May 1 at Lawrence’s Youth Sports Complex. Entry deadline is April 15 or the first 12 teams to enter. For more info, contact Allen Winter at 841-3692 or visit www.lawrenceks.org/lprd/_youthsports/softball/lawrenceinvitational11.pdf.

Softball tryouts: 4U2NV will be holding tryouts for 12UC girls fastpitch softball team from 1 p.m. to 4 p.m. Saturday and Sunday at YSC (formerly YSI) fields 5 and 6.

Kickball fundraiser: The Lawrence Phenix 14-U is putting on a fundraising kickball tournament on March 26 at YSC fields. Cost is $150 per team. For information, call 218-9155 or e-mail phenixfastpitch@yahoo.com.

Horsehoe pitching: Anyone interested in pitching horseshoes at Broken Arrow Park on Thursday evenings should contact Wynne at 843-8450.

Wayne Simien Free Throw Challenge: Six age divisions — starting with fourth and fifth grade and extending through seniors (ages 55 and up) are eligible to compete for prizes in individual and team competitions April 9 and 10, 2 p.m. in Allen Fieldhouse in a benefit free-throw contest. Entry fee for individual competition: $10. Individual and team: $15.

Special Olympics Kansas crappie tournament: A crappie tournament to benefit Special Olympics Kansas will be 7 a.m. to 2 p.m. April 30 at Clinton Lake Boat Ramp No. 2. Tournament sign-in will be from 5:30 a.m. to 6:30 a.m. The registration is $80 for a two-person team if you sign up before April 22. It will be $100 per two-person team the morning of the tournament. Registration form, waiver, rules and a list of sponsors are available at http://www.firstgiving.com/ksso/Event/crappiefishingtournament. Boat number is determined by registration order. Teams will weigh 10 best crappie. Tournament will be held rain or shine. For more information contact Kim Brice at 424-0830 or at brice@lkpd.org.

Baseball openings: The U10 DCABA Lawrence Thunder are looking for 9- or 10-year-old players. For more information, contact Craig Frederickson at 841-8619 or 408-6571.

Softball opening: 10U DC Attack girls fastpitch team is looking for an experienced pitcher to join the team. The pitcher will get significant mound time through tournaments and league play. Reasonable fees. Call Steve Patton 865-4136 for more information.

Ad Astra shines: Twenty-two swimmers from Ad Astra Area Aquatics qualified to compete in the 2011 Division 1 Regional Championship meet March 11-13 in Wichita. AAAA won the small team division and placed fourth overall. Claire Campbell won all seven of the events she swam. In both the 50 freestyle and the 100 freestyle, she missed the meet record by only .04 and .10 seconds respectively. Both records were set in 1985 by Olympian Janie Wagstaff.

Baldwin wrestlers honored: Two Baldwin High wrestlers have received postseason honors. Senior Colby Soden was named first-team Academic All-State by the KWCA, and senior Jesse Austin has been selected for the East Kansas Senior All-Star dual, which will be at 7:15 p.m. Friday at Olathe East High.

Wrestling club: The Douglas County Gold Freestyle/Greco-Roman wrestling club will begin April 5 at the South Gym in Baldwin City, located at Eighth & Chapel Streets. Practices from 6-7 p.m. on Tuesdays and Thursdays and 6:30-7:30 p.m. on Wednesdays. No fee, but USA card required. All ages and skill levels welcome.

Aquahawks at division: The Lawrence Aquahawks Swim Team placed several swimmers in finals at the Missouri Valley Division I Short Course Swimming Championships this past weekend in Wichita. The Aquahawks had 15 swimmers in championship-finals heats. The Aquahawks are coached by Zach Devine.

Aquahawks tryout: The Lawrence Aquahawks will be holding a new swimmer tryout at 4:15 p.m. on April 4 at the Indoor Aquatic Center. This tryout is open to ages 5-18. Participants should bring suit, towel and goggles if they have a pair. For information, contact coach Zach Devine at 393-7966.

Houk League registration: Late registrations are being accepted through April 5 for the Houk Baseball League. Registration forms are available at the Holcom Park Recreation Center, 2700 W. 27th Street, as well as online at www.lprd.org. Those who register will be informed of evaluation dates. Must be pre-registered to participate. For information, contact Lee Ice at 832-7940.

LPRD baseball, softball: Registration deadline for the Lawrence Parks and Recreation Youth baseball/softball program (grades K-6) is April 8. Registration forms are available at the Holcom Park Recreation Center, 2700 W. 27th Street, as well as online at www.lprd.org. For information, contact Lee Ice at 832-7940.

Orchards ladies: Orchards Ladies Golf Club’s preseason meeting will be at 9 a.m. March 26 at the Orchards Golf Course. New members welcome. Play begins March 31 and April 1. Call Ed White for information at 843-7456.

Dam Run looms: Lawrence Parks and Recreation registration is going on for the 5K-12K Dam Run, scheduled for 9 a.m. on March 26 at the Clinton Lake Softball Complex. Entry fee is $20 for the 5K and 12K run and $14 for the one-mile fun run. Registration day of the race is $22. For information, call 832-7940.

Alvamar meeting/social: The Alvamar Ladies Golf Club would like to invite former members and those interested in joining to an informational meeting/social at Alvamar Public Clubhouse, 1800 Crossgate Dr., at 6 p.m. on Monday, March 28. Contact Barb Trouslot at 766-1046 for more information.