| 4x200 Relay - Compare top 10 |
| 1. | | Relay Team | 1:34.62 | IL | Fox Lake (Grant) | Feb 23 | Huntley Boys Invite 2018 |
| 2. | | Michael Smith
Christian Suaste
Alex Alva
Jonathan Bolton | 1:35.79 | IL | Fox Lake (Grant) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 3. | | AJ Lehman
Tomas Sagartz
Max Martinez
Larry Reed | 1:36.37 | IL | Grayslake (Central) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 4. | | Tomas Sagartz
Ethan Richardson
AJ Lehman
Max Martinez | 1:37.09 | IL | Grayslake (Central) | Mar 17 | Lake Michigan Boys Invitational |
| 5. | | Javen London
Treshawn Watson
Robert Christiansen
Khalil Anderson | 1:38.59 | IL | Antioch | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 6. | | Relay Team | 1:39.10 | IL | Antioch | Mar 17 | Lake Michigan Boys Invitational |
| 7. | | Larry Reed
Max Martinez
AJ Lehman
Peder Harvey | 1:39.19 | IL | Grayslake (Central) | Mar 02 | HF Boys ABC Indoor Invite |
| 8. | | Henry Halverson
Christian Suaste
Alex Alva
Justin Splitt | 1:39.38 | IL | Fox Lake (Grant) | Mar 24 | Illinois Top Times 3A Championships |
| 9. | | Luis Anzo
Davon Horton
Justin Langwinski
Ernesto Vargas | 1:39.96 | IL | Round Lake | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 10. | | Parker Canning
DJ Watts
Erwin Kleppin
Jeff Milostan | 1:40.52 | IL | Lake Villa (Lakes) | Feb 23 | Antioch Indoor Track & Field Invitational |
| 4x400 RelayCompare top 10 |
| 1. | | Relay Team | 3:27.24 | IL | Fox Lake (Grant) | Mar 24 | Illinois Top Times 3A Championships |
| 2. | | Bobby Cayet
Henry Halverson
Christian Suaste
Jason Thormo | 3:34.82 | IL | Fox Lake (Grant) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 3. | | Colin O'Malley
Noah Styczen
Eli Minsky
Davion Harris | 3:38.90 | IL | Grayslake (Central) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 4. | | Jeff Milostan
Charlie Halberg
Erwin Kleppin
Carlo Picchietti | 3:39.05 | IL | Lake Villa (Lakes) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 5. | | Relay Team | 3:40.57 | IL | Lake Villa (Lakes) | Mar 17 | Lake Michigan Boys Invitational |
| 6. | | Ethan Richardson
Noah Styczen
Roman Tovar
Larry Reed | 3:41.21 | IL | Grayslake (Central) | Mar 17 | Lake Michigan Boys Invitational |
| 7. | | Roman Tovar
AJ Lehman
Larry Reed
Noah Styczen | 3:41.34 | IL | Grayslake (Central) | Feb 23 | Antioch Indoor Track & Field Invitational |
| 8. | | Relay Team | 3:42.08 | IL | Antioch | Mar 17 | Lake Michigan Boys Invitational |
| 9. | | Parker Canning
Jeff Milostan
Charlie Halberg
Erwin Kleppin | 3:42.19 | IL | Lake Villa (Lakes) | Feb 23 | Antioch Indoor Track & Field Invitational |
| 10. | | Nico Fier
Dino Kaliakmanis
Ryan Shaputis
Charlie Smith | 3:43.03 | IL | Antioch | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 4x800 RelayCompare top 10 |
| 1. | | Charlie Halberg
Jack Engel
Talon Knauf
Jack Erwin | 8:34.57 | IL | Lake Villa (Lakes) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 2. | | Eli Minsky
Ben Vogeler
Owen Aaberg
Roman Tovar | 8:34.59 | IL | Grayslake (Central) | Feb 23 | Antioch Indoor Track & Field Invitational |
| 3. | | Relay Team | 8:34.84 | IL | Lake Villa (Lakes) | Mar 17 | Lake Michigan Boys Invitational |
| 4. | | Connor Brennan
Connor Riss
Seneca Lawson
Brandt Batteau | 8:38.37 | IL | Grayslake (North) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 5. | | Ben Vogeler
Evan Johns
AJ Lehman
Roman Tovar | 8:40.87 | IL | Grayslake (Central) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 6. | | Eli Minsky
Colin O'Malley
Roman Tovar
Ben Vogeler | 8:46.75 | IL | Grayslake (Central) | Mar 02 | HF Boys ABC Indoor Invite |
| 7. | | Charlie Halberg
Jack Erwin
Ethan Schommer
Carlo Picchietti | 8:47.16 | IL | Lake Villa (Lakes) | Feb 23 | Antioch Indoor Track & Field Invitational |
| 8. | | Sebastian Scofield
Mike Volkmar
Joe Kestian
Josh Linck | 8:47.24 | IL | Antioch | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
| 9. | | Carlo Picchietti
Charlie Halberg
Nick Weilbaker
Jack Erwin | 8:47.67 | IL | Lake Villa (Lakes) | Mar 02 | HF Boys ABC Indoor Invite |
| 10. | | Justin Splitt
Zachary Deacon
Colton Romig
Ryan Bishop | 8:47.88 | IL | Fox Lake (Grant) | Mar 08 | 2018 NLCC Boys & Girls Indoor Championships |
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