| XLVI South American U20 Championships in Athletics | |
| Host City: |  Lima, Peru |
| Dates: | 12–14 July |
| Stadium: | Villa Deportiva Nacional |
| Nations Participating: | 13 |
| Events: | 45 |
| Level: | U20 |
| Previous: | 2023 Bogotá |
| Next: | 2026 TBD |
The 46th South American U20 Championships in Athletics were held at Villa Deportiva Nacional in Lima, Peru, on 20 and 21 July.[1]
| 100 metres (-0.6 m/s) | Benjamín Aravena | 10.65 | Aron Earl | 10.66 | Tomás Mondino | 10.82 | |
| 200 metres (–0.5 m/s) | Benjamín Aravena | 21.62 | Wesley da Silva | 21.66 | Paulo Batista | 21.73 | |
| 400 metres | Malachi Austin | 47.21 | Ian Andrey Pata | 47.69 | Vinícius Galeno | 48.29 | |
| 800 metres | Uriel Muñoz | 1:51.22 | Lucas Jara | 1:51.84 | Bryan Alves | 1:52.00 | |
| 1500 metres | Uriel Muñoz | 3:55.82 | Lucas Jara | 3:56.31 | Luis Huamán | 3:57.48 | |
| 3000 metres | Luis Huamán | 8:38.31 | Manuel Rojas | 8:39.08 | Brayan Huanca | 8:40.90 | |
| 5000 metres | Kheny Meneses | 14:27.60 | Manuel Rojas | 14:28.44 | Brayan Huanca | 14:39.97 | |
| 110 metres hurdles (99 cm) (-0.5 m/s) | Vinícius de Brito | 13.86 | Odair de Aguiar Jr. | 14.09 | Gerónimo Canizales | 14.17 | |
| 400 metres hurdles | José David Mosquera | 52.11 | Ramón Fuenzalida | 52.46 | Ian Andrey Pata | 52.86 | |
| 3000 m steeplechase | Samuel Santana | 9:08.79 | Leonardo Guerrero | 9:13.4 | Julio Espinoza | 9:27.3 | |
| 4 × 100 m relay | 41.20 | 41.47 | 41.84 | ||||
| 4 × 400 m relay | 3:14.63 | 3:14.94 | 3:16.48 | ||||
| 10,000 m walk | Jesús Ramírez | 43:06.71 | Julián Alfonso | 43:07.55 | Iván Oña | 43:25.79 | |
| High jump | Jholeixon Rodríguez | 2.01 | Janer Caicedo | 1.95 | Eric Cardoso | 1.95 | |
| Pole vault | Pedro Aparecido | 4.70 | Andrés Torres | 4.40 | Only two athletes with valid marks | ||
| Long jump | Murilo Silva | 7.32 | Renan Akamine | 7.08 | Christopher Thiessen | 7.01 | |
| Triple jump | Santiago Theran | 15.56 | Gilvan da Costa | 15.52 | Roy Jair Chila | 14.98 | |
| Shot put (6 kg) | Alessandro Soares | 18.48 | Erik Caicedo | 17.02 | Pedro Modesto | 16.79 | |
| Discus throw (1.75 kg) | Juan David Montaño | 60.29 | Alberto Rodrigues | 58.56 | Alan Fell | 53.88 | |
| Hammer throw (6 kg) | Cipriano Riquelme | 68.19 | Juan Sebastián Scarpetta | 68.16 | Eduardo Fernandes | 66.33 | |
| Javelin throw | Yirmar Torres | 73.21 | Arthur Curvo | 71.90 | Orlando Fernández | 67.70 | |
| Decathlon (U20) | Romeo Männel | 6868 | Edgar Rosabal | 6802 | Facundo Millan | 6398 | |
| 100 metres (+0.4 m/s) | Atheleyha Hinckson | 11.76 | María Camila Maturana | 11.85 | Vanessa dos Santos | 11.86 | |
| 200 metres (0.0 m/s) | Antonia Ramírez | 24.24 | Dana Jiménez | 24.32 | Hakelly da Silva | 24.41 | |
| 400 metres | Julia Ribeiro | 54.32 | Nahomy Castro | 54.87 | Tianna Springer | 55.12 | |
| 800 metres | Isabel Conde | 2:06.00 | Sabrina Pena | 2:08.57 | Luise Braga | 2:09.20 | |
| 1500 metres | Vanessa Alder | 4:28.07 | Lily Alder | 4:28.30 | Luise Braga | 4:28.96 | |
| 3000 metres | Vanessa Alder | 9:50.61 | Karol Luna | 9:51.41 | Luz Arias | 9:51.88 | |
| 5000 metres | Luz Arias | 17:07.70 | Alison Guamán | 17:11.07 | Lilian Mateo | 17:17.62 | |
| 100 metres hurdles (-1.2 m/s) | Helen Bernard | 13.82 | Catalina Rozas | 13.90 | Luciana Zapata | 13.93 | |
| 400 metres hurdles | Amanda da Silva | 59.63 | Paola Loboa | 1:00.13 | Helen Bernard | 1:00.19 | |
| 3000 m steeplechase | Alison Guamán | 10:35.97 | Laura Camargo | 10:44.78 | Rusell Cjuro | 10:50.40 | |
| 4 × 100 m relay | 46.15 | 46.23 | 46.55 | ||||
| 4 × 400 m relay | 3:43.24 | 3:45.22 | 3:47.86 | ||||
| 10,000 m walk | Ruby Segura | 48:26.39 | Katherine Barreto | 50:47.23 | María Elena Potilla | 51:43.53 | |
| High jump | María Arboleda | 1.82 | Maria Eduarda de Oliveira | 1.76 | Luisa Lopes | 1.70 | |
| Pole vault | Carolina Scarponi | 3.80 | Júlia Calabretti | 3.80 | Luna Pabón Luiza Batista | 3.60 | |
| Long jump | Vanessa Sena | 6.17 | Dana Jiménez | 6.05 | Victoria Zanolli | 5.84 | |
| Triple jump | Sylvana Behile | 12.96 | Valery Arce | 12.43 | Noemi Caicedo | 12.10 | |
| Shot put | Belsy Quiñónez | 15.09 | Edimara de Jesus | 14.51 | Natalia Cardoso | 14.15 | |
| Discus throw | Ottaynis Febres | 47.52 | Stefania Mena | 47.33 | Samanta Lopes | 46.78 | |
| Hammer throw | Giuliana Baigorria | 57.62 | Kimberly Assiz | 55.04 | Florencia Sánchez | 52.68 | |
| Javelin throw | Milagros Rosas | 47.52 | Malena Cordoba | 46.36 | Hashly Ayovi | 45.02 | |
| Heptathlon | Renata Godoy | 5062 | Isabela Teixeira | 4954 | Julia Leite | 4917 | |
| 4 × 400 m relay | 3:24.31 | 3:27.72 | 3:28.80 |