| Date | R | Home v Away | - | |
|---|---|---|---|---|
| 04/22 16:00 | - | Saprissa de Corazon U20 v AD Guanacasteca U20 | L | 6-0 |
| 03/31 16:00 | - | AD Guanacasteca U20 v Guadalupe FC U20 | W |
|
| 02/11 16:00 | - | Herediano U20 v AD Guanacasteca U20 | L | 5-1 |
| 10/28 17:00 | - | AD San Carlos U20 v AD Guanacasteca U20 | W | 2-3 |
| 10/23 17:00 | - | AD Guanacasteca U20 v Deportivo Saprissa U20 | D | 0-0 |
| 10/15 17:00 | - | AD Guanacasteca U20 v Puntarenas U20 | - | View |
| 09/10 20:03 | - | Saprissa de Corazon U20 v AD Guanacasteca U20 | L | 5-1 |
| 09/03 00:00 | - | Cartagines U20 v AD Guanacasteca U20 | L | 2-1 |
| 08/29 17:00 | - | AD Guanacasteca U20 v AD San Carlos U20 | D | 1-1 |
| 05/16 19:53 | - | Herediano U20 v AD Guanacasteca U20 | D | 1-1 |
| 04/30 18:30 | - | AD San Carlos U20 v AD Guanacasteca U20 | L | 3-0 |
| 04/13 16:00 | - | AD Guanacasteca U20 v ADR Jicaral U20 | D | 0-0 |
| 03/14 21:00 | - | AD Guanacasteca U20 v ADR Jicaral U20 | L | 0-1 |
| 02/25 19:45 | - | Herediano U20 v AD Guanacasteca U20 | L | 3-0 |
| 02/18 17:00 | - | AD Guanacasteca U20 v AD San Carlos U20 | W | 2-1 |
| 02/13 20:07 | - | ADR Jicaral U20 v AD Guanacasteca U20 | D | 0-0 |
| 01/28 21:14 | - | Alajuelense U20 v AD Guanacasteca U20 | D | 1-1 |
| 01/24 19:00 | - | AD Guanacasteca U20 v AD Grecia U20 | D | 1-1 |
| 11/12 20:00 | - | Municipal Perez Zeledon U20 v AD Guanacasteca U20 | L | 2-0 |
| 11/05 20:00 | - | AD Guanacasteca U20 v Municipal Perez Zeledon U20 | L | 1-2 |
| 10/29 17:00 | - | AD Grecia U20 v AD Guanacasteca U20 | W | 1-2 |
| 10/15 20:00 | - | AD Guanacasteca U20 v Alajuelense U20 | L | 0-2 |
| 10/08 17:00 | - | Alajuelense U20 v AD Guanacasteca U20 | L | 4-1 |