| 500 Freestyle | ||||||
| State Record: 4:30.62 National Record: 4:16.39 All-American Automatic: 4:32.88 All-American Consideration: 4:43.00 1998 Qualifying Time: 5:14.81 | ||||||
| Rank | Last Name | First Name | GR | School | Time | Date |
| 1 | HACKNEY | CODY | 10 | CR KENNEDY | 4:55.36 | 12/16/98 |
| 2 | SOURBEER | JOHN | 11 | WDM DOWLING | 4:55.39 | 12/12/98 |
| 3 | GIRARD | ALEX | 11 | CEDAR FALLS | 4:55.63 | 12/12/98 |
| 4 | SNIDER | JASON | 11 | WDM VALLEY | 4:56.52 | 12/8/98 |
| 5 | HALE | JOSHUA | 12 | CB LINCOLN | 4:56.83 | 12/19/98 |
| 6 | ALBERT | MATT | 10 | PLEASANT VALLEY | 4:56.84 | 12/17/98 |
| 7 | GEORGE | CHRIS | 12 | ANKENY | 4:59.83 | 12/3/98 |
| 8 | LEHENBAUER | ADAM | 9 | BETTENDORF | 5:07.89 | 12/10/98 |
| 9 | LONERGAN | MIKE | 11 | BETTENDORF | 5:10.51 | 12/5/98 |
| 10 | MANDSAGER | GRANT | 11 | URBANDALE | 5:11.97 | 12/5/98 |
| 11 | MEACHAM | GARTH | 11 | WDM DOWLING | 5:14.02 | 12/12/98 |
| 12 | BALDWIN | TYLER | 12 | WDM DOWLING | 5:14.08 | 12/8/98 |
| 13 | ADRIANSE | JOHN | 12 | DM LINCOLN | 5:14.44 | 12/3/98 |
| 14 | WELTER | JOHN | 10 | CEDAR FALLS | 5:15.46 | 12/16/98 |
| 15 | WOLF | RICHARD | 10 | WDM VALLEY | 5:16.40 | 12/8/98 |
| 16 | KREMER | NATE | 12 | MARSHALLTOWN | 5:17.28 | 12/3/98 |
| 17 | MARSTERS | JUSTIN | 12 | MASON CITY | 5:19.26 | 12/12/98 |
| 18 | ANDERSON | JUSTIN | 12 | BETTENDORF | 5:19.57 | 12/17/98 |
| 19 | GUNTHER | THAD | 12 | MUSCATINE | 5:21.24 | 12/17/98 |
| 20 | MASON | JOHN | 9 | CEDAR FALLS | 5:22.22 | 12/12/98 |
| 21 | SHANLEY | EVAN | 9 | CF-NU HIGH | 5:23.07 | 12/12/98 |
| 22 | SCHMITZ | ERIC | 12 | SC METRO | 5:23.12 | 12/15/98 |
| 23 | MIDDENDORF | TRENT | 12 | WDM DOWLING | 5:23.42 | 12/12/98 |
| 24 | WESTHOFF | MATT | 12 | DBQ HEMPSTEAD | 5:24.16 | 12/15/98 |
| 25 | HOLZ | KEVIN | 9 | CF-NU HIGH | 5:25.04 | 12/12/98 |
| 26 | GRIFFITH | TYLER | 12 | CR WASHINGTON | 5:25.08 | 12/17/98 |
| 27 | YACK | ADAM | 11 | IOWA CITY | 5:25.49 | 12/15/98 |
| 28 | KRUSE | JOSHUA | 12 | SC EAST | 5:26.02 | 12/15/98 |
| 29 | SCHERLER | BEN | 12 | DAV. CENTRAL | 5:26.62 | 12/10/98 |
| 30 | MC CORD | RYAN | 12 | OTTUMWA | 5:27.36 | 12/17/98 |
| 31 | ANDERSON | ERIC | 9 | WDM VALLEY | 5:29.29 | 12/10/98 |
| 32 | NORING | JASON | 12 | CEDAR FALLS | 5:32.41 | 12/16/98 |
| 33 | WALTER | BRETT | 11 | WDM VALLEY | 5:33.01 | 12/10/98 |
| 34 | HALE | LUCAS | 9 | CB LINCOLN | 5:33.33 | 12/15/98 |
| 35 | FRANK | RYAN | 12 | BURLINGTON | 5:33.34 | 12/17/98 |
| 36 | KUKLA | JOEY | 11 | DBQ HEMPSTEAD | 5:33.77 | 12/15/98 |
| 37 | RUSSELL | NATHAN | 9 | LINN-MAR | 5:33.80 | 12/10/98 |
| 38 | SCOTT | DAVID | 12 | CR JEFFERSON | 5:35.50 | 12/10/98 |
| 39 | HEALEY | LUKE | 12 | AMES | 5:35.88 | 12/3/98 |
| 40 | WHITE | ALEX | 12 | AMES | 5:37.27 | 12/17/98 |
| 41 | VER HUEL | C.T. | 11 | ANKENY | 5:40.79 | 12/3/98 |
| 42 | TULLER | JOEY | 12 | OTTUMWA | 5:41.80 | 12/10/98 |
| 43 | GANTENBEIN | JACOB | 10 | DBQ SENIOR | 5:41.85 | 12/19/98 |
| 44 | STONEBREAKER | MARTIN | 12 | BETTENDORF | 5:41.86 | 12/10/98 |
| 45 | KARNEY | DAN | DM ROOSEVELT | 5:43.02 | 12/5/98 | |
| 46 | JACKSON | JUSTIN | 10 | PLEASANT VALLEY | 5:43.55 | 12/17/98 |
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