TFRRS Performance Profile
Career Accolades
- All-ACC Cross Country (2025)
- All-ACC first-team outdoor track and field (2025)
- Two-time All-West Region XC (2024, 2025)
- NCAA West Region XC team champions (2023)
- Pac-12 XC team champions (2023)
- U.S. under-20 XC champion (2023)
- Ranks in the "Stanford Top 10" in six events
- No. 2 - Indoor DMR (9:27.27)
- No. 3 - Indoor Mile (3:56.17)
- No. 4 - Outdoor 1,500m (3:35.96)
- No. 6 - Outdoor 5,000m (13:24.84)
- No. 7 - Indoors 5,000m (13:30.21)
- No. 8 - Indoor 800m (1:49.81)
- CSC Academic All-American (2025)
- Two-time CSC Academic All-District (2025-26)
- All-ACC Outdoor Academic Team (2026)
- All-ACC Indoor Academic Team (2026)
- Two-time ACC All-Academic (XC: 2024, 2025)
- Threee-time USTFCCCA All-Academic (XC 2024; T&F 2024, 2025)
As a Junior (2025-26)
Outdoors
- CSC Academic All-District
- All-ACC Outdoor Academic Team
- Qualified the 1,500m (16th) and 5,000m (24th) at the NCAA West First Round
- Raced the 1,500m (8th) and 5,000m (20th) at the ACC Championships
- Ran a career-best 5,000m (13:24.84) at the Payton Jordan Invitational, good for No. 6 in program history
Indoors
- Two-time All-ACC (Mile, DMR)
- All-ACC Indoor Academic Team
- Earned all-conference honors in the mile (3rd) and DMR (3rd) at the ACC Championships
- Climbed to No. 3 in program history in the mile (3:56.17) and No. 8 in the 800m (1:49.81) with new career bests at the Husky Classic
- Set a new personal best 3000m (7:52.46) at the UW Preview
Cross Country
- All-ACC Cross Country
- All-West Region XC
- All-ACC XC Academic Team
- Served as Stanford's No. 1 runner in all four team meets
- Ran a personal-best time of 22:55.0 at ACC Championships placing fifth overall
- Earned highest placement in cross country race with third place finish at NCAA West Regionals
- Placed 72nd in his third NCAA Championships with a time of 29:25.3
As a Sophomore (2024-25)
Outdoors
- All-ACC first team
- USTFCCCA All-Academic
- CSC Academic All-American
- Placed third in the 1,500 at the ACC Championships
- The place was his collegiate-best conference finish
- Advanced to first NCAA track and field championships, in the 1,500
- Ran personal 1,500 best of 3:38.00 at the Bryan Clay Invitational
- The time placed him No. 7 in school history
- Ran lifetime bests at three distances -- 1,500, 5,000, and 800
- Ran personal 5,000 best of 13:31.91 at Stanford Invitational
- Ran personal 800 best of 1:50.81 at Stanford Invitational
Indoors - Set personal records in the 5,000 and the mile
- Ran first sub-4 mile, in 3:58.48 at Husky Classic
- The time placed him No. 7 on Stanford's all-time indoor list
- Set personal best in the 5,000 by running 13:37.15 at Colyear-Danville Opener
- The time placed him No. 8 on Stanford's all-time indoor list
- Ran leadoff on seventh-place distance medley relay team at the ACC Championships
Cross Country - All-West Region
- Second at Missouri's Gans Creek Classic as team's No. 1 runner
- Placed 10th at NCAA West Regionals, as team's No. 2 runner
- Stanford's No. 4 runner at NCAA Championships
- USTFCCCA All-Academic
- ACC All-Academic
As a Freshman (2023-24)
Outdoors
- Advanced to the NCAA West Prelims in the 1,500 and 5,000
- Highest placing American true freshman in the NCAA West Prelims 1,500
- Ran a season best 3:41.84 at the Prelims to tie for No. 5 on Stanford's all-time frosh list
- Ran personal best 13:46.81 for 5,000 at the Stanford Invitational
- USTFCCCA All-Academic
Indoors
- Set the Stanford freshmen 3,000 record of 7:54.38
- The time came during a second-place finish at the Ken Shannon Invitational
- Ran 4:02.57 mile at Ken Shannon for No. 5 on school frosh list
- Ran third leg on distance medley relay team that ran 9:27.06 for the No. 2 time in school history
Cross Country * Pac-12 Champions * West Region Champions - Made collegiate debut at the Virginia Invitational, placing 46th
- Stanford's No. 4 runner at NCAA West Regionals, placing 26th
- Stanford's No. 6 runner at NCAA Championships
International/National Competition
- 16th at World Under-20 Cross Country Championships in Australia
- U.S. U20 champ in 2023
Prior to Stanford
- Ran lifetime 1,500 best of 3:39.39 at the 2023 Bryan Clay Invitational
- The time placed him No. 7 on the all-time high school list with the No. 7 performance ever
- It was second-fastest among high school runners in 2023
- Leo and twin Lex were part of the Newbury Park cross country team that won the 2022 Nike Cross Nationals
- In 2022, 11th at the Nike Cross Nationals, second in the California Division II race, and second in the CIF-Southern Section Division II final
- At the 2021 Woodbridge Invite in Irvine, Leo clocked 13:38.1, the fastest three-mile high school cross country time in history
- At the 2021 RunningLane Cross Country Nationals, Leo was second in 14:05.1, the second-fastest cross-country 5K of all-time
- Second in the mile at the Nike Outdoor Nationals in 4:02.58, the No. 8 time among high schoolers in 2023
- Ran his mile PB of 4:00.77 at the 2022 Azusa Pacific Meet of Champions Distance Classic
Personal
- Parents are Lynne and Andrew Young
- Brothers are Nico, a two-time NCAA champion and 2024 Olympian in the 10,000, and twin Lex, a Stanford teammate
- Leo and Lex have their own YouTube channel, "L&L", where they share their running careers and seek to inspire young runners
- Board member of Doctors of the World, an international humanitarian organization which seeks to provide emergency and long-term medical care to the world's most vulnerable people
Career Results
| Year | Season (Meets) | Event | Season Best | Conf. | Region | NCAA |
| 2025-26 | Outdoors (5) | 800m | 1:51.00 | -- | -- | -- |
| 1,500m | 3:38.05 | 8th | 16th | -- | ||
| 5,000m | 13.24.84 | 20th | 24th | -- | ||
| Indoors (6) | 800m | 1:49.81 | -- | -- | -- | |
| 1,500m | 3:40.96 | -- | -- | -- | ||
| Mile | 3:56.17 | 3rd | -- | -- | ||
| 3,000m | 7:52.46 | DNF | -- | -- | ||
| 4x400 | 3:25.91 | -- | -- | -- | ||
| DMR | 9:36.50 | 3rd | -- | -- | ||
| Cross Country (5) | 8K | 22:55.0 | 5th | -- | -- | |
| 10K | 29:25.3 | -- | 3rd | 72nd | ||
| 2024-25 | Outdoors (5) | 1,500 | 3:38.00 | 3rd | 5th | -- |
| 5,000 | 13:31.92 | DNF | 36th | -- | ||
| 800 | 1:50.81 | -- | -- | -- | ||
| 3,000 | 8:12.84 | -- | -- | -- | ||
| Indoors (5) | Mile | 3:58.48 | 10th | -- | -- | |
| 3,000 | 7:54.98 | -- | -- | -- | ||
| 5,000 | 13:37.15 | -- | -- | -- | ||
| DMR | 9:35.66 | 7th | -- | -- | ||
| Cross Country (5) | 8K | 23:05.3 | 23rd | -- | -- | |
| 10K | 29:15.4 | -- | 10th | 92nd | ||
| 2023-24 | Outdoors (6) | 1,500 | 3:41.84 | 9th | 16th | -- |
| 5,000 | 13:46.81 | 13th | 42nd | -- | ||
| 3,000 | 8:50.86 | -- | -- | -- | ||
| 800 | 1:53.97 | -- | -- | -- | ||
| Indoors (6) | Mile | 4:02.57 | -- | -- | -- | |
| 3,000 | 7:54.38 | -- | -- | -- | ||
| 5,000 | 13:49.71 | -- | -- | -- | ||
| 1,000 | 2:25.75 | -- | -- | -- | ||
| DMR | 9:27.06 | -- | -- | -- | ||
| Cross Country (3) | 8K | 23:58.8 | -- | -- | -- | |
| 10K | 31:31.6 | -- | 26th | 185th |