Pairwise course analysis
LA 5K Coursevs.Groton School
Based on runners who competed on both courses during the same season. Positive values mean the second course ran slower; negative values mean it ran faster.
Model verdict
Groton School runs faster
-4.13%
Roughly 49.6 seconds faster for a 20:00 runner
Paired observations
57
Strong evidence
Median difference
-3.66%
Middle runner-season comparison
Overall estimate
-4.13%
Network-adjusted course estimate
Middle 50% range
+6.48%
Observed variation (IQR)
Direction and magnitude
Relative course speed
Groton School fasterEvenGroton School slower
Confidence interval
-5.22% to -1.85%
Scale shown
-6% to +6%
Course context
The two courses
Underlying runner comparisons
Same-season evidence
Each row represents one runner-season with valid results on both courses. Median performances reduce the effect of one unusually good or poor race. JV and varsity results are included.
| Runner | Season | LA 5K Course | Groton School | Difference |
|---|---|---|---|---|
| Joshua White | 2022 | 28:17.001 race | 23:29.001 race | -16.97% |
| Owen Wang | 2019 | 25:45.001 race | 21:34.001 race | -16.25% |
| Nathaniel Voss | 2021 | 20:38.001 race | 18:17.001 race | -11.39% |
| Rinto Nakazawa | 2025 | 26:18.001 race | 23:22.001 race | -11.15% |
| William Trautz | 2021 | 19:30.001 race | 17:32.001 race | -10.09% |
| Anthony Coston | 2022 | 23:31.001 race | 21:09.001 race | -10.06% |
| Nathan Pappas | 2021 | 23:09.001 race | 21:02.001 race | -9.14% |
| Michael Bobo | 2021 | 21:28.001 race | 19:32.001 race | -9.01% |
| Angus Harrison | 2021 | 20:48.001 race | 18:58.001 race | -8.81% |
| Arec Keomurjian | 2021 | 20:15.001 race | 18:36.001 race | -8.15% |
| Aaron Stanger | 2021 | 19:59.001 race | 18:22.001 race | -8.09% |
| Myles McCusker | 2022 | 22:54.002 races | 21:03.001 race | -8.08% |
| Charlotte Lokere | 2022 | 27:16.003 races | 25:10.001 race | -7.70% |
| Davis Woolbert | 2021 | 20:21.001 race | 18:47.001 race | -7.70% |
| George Yerid | 2025 | 23:17.001 race | 21:38.001 race | -7.09% |
| Jackson Pagan | 2021 | 21:03.001 race | 19:37.001 race | -6.81% |
| James Donahue | 2021 | 16:53.001 race | 15:46.001 race | -6.61% |
| Quinn McCaffrey | 2025 | 23:19.001 race | 21:49.001 race | -6.43% |
| Carver Porter | 2021 | 21:56.001 race | 20:33.001 race | -6.31% |
| Andrew Bittner | 2021 | 23:01.001 race | 21:35.001 race | -6.23% |
| Kinh Kieu | 2022 | 30:59.002 races | 29:06.001 race | -6.08% |
| Jeremy Eaton | 2021 | 21:36.001 race | 20:18.001 race | -6.02% |
| Alan Wang | 2025 | 24:57.001 race | 23:29.001 race | -5.88% |
| Emmett Kellogg | 2025 | 26:03.001 race | 24:34.001 race | -5.69% |
| Alexander Colangelo | 2022 | 19:25.001 race | 18:19.001 race | -5.67% |
| Sophia Ronchetti | 2019 | 32:34.001 race | 30:54.001 race | -5.12% |
| Patrick Riley | 2019 | 24:57.002 races | 23:54.001 race | -4.21% |
| Lucas Miller | 2022 | 21:04.002 races | 20:11.001 race | -4.19% |
| Quentin DeFreitas | 2022 | 24:34.002 races | 23:40.001 race | -3.66% |
| Alexander Kirby | 2022 | 21:29.002 races | 20:44.001 race | -3.49% |
| Caleb Stokes | 2025 | 23:27.001 race | 22:41.001 race | -3.27% |
| Myles McCusker | 2025 | 20:41.001 race | 20:01.001 race | -3.22% |
| Lucas Miller | 2025 | 18:52.001 race | 18:17.001 race | -3.09% |
| Shaniece Nugent | 2019 | 26:38.002 races | 25:49.001 race | -3.07% |
| Kate Tarr | 2025 | 21:16.001 race | 20:40.001 race | -2.82% |
| Sebastian Sepulveda | 2019 | 22:28.002 races | 22:00.001 race | -2.08% |
| Jack Carolan | 2019 | 28:21.002 races | 27:47.001 race | -2.00% |
| Cameron Regonini | 2025 | 21:52.001 race | 21:26.001 race | -1.98% |
| Matthew Smith | 2022 | 21:59.002 races | 21:33.001 race | -1.97% |
| Rhaya Nestor | 2025 | 24:53.001 race | 24:31.001 race | -1.47% |
| Charles Zhang | 2022 | 26:14.002 races | 25:55.001 race | -1.21% |
| Lexi Hinck | 2025 | 25:38.001 race | 25:20.001 race | -1.17% |
| Enock Musyoka | 2019 | 17:08.002 races | 16:57.001 race | -1.07% |
| Alana Brownstein | 2025 | 25:34.001 race | 25:19.001 race | -0.98% |
| Nicole Fallon | 2025 | 22:49.001 race | 22:40.001 race | -0.66% |
| Brandon Christ | 2019 | 19:44.002 races | 19:39.001 race | -0.42% |
| Eloise Finley | 2025 | 24:53.001 race | 24:51.001 race | -0.13% |
| Paris Liston | 2021 | 20:57.001 race | 21:11.001 race | +1.11% |
| Jess Fatzinger | 2019 | 27:54.002 races | 28:19.001 race | +1.49% |
| Arhant Ghanta | 2019 | 24:06.002 races | 24:41.001 race | +2.42% |
| Violet Safari | 2025 | 23:56.001 race | 24:46.001 race | +3.48% |
| Keira Amick | 2025 | 26:02.001 race | 27:07.001 race | +4.16% |
| Daichi Seki | 2019 | 21:04.002 races | 21:58.001 race | +4.27% |
| Ethan Paek | 2019 | 19:30.002 races | 20:58.001 race | +7.52% |
| Kiet Nguyen | 2019 | 24:48.002 races | 26:52.001 race | +8.33% |
| Joo-Ran Schaerer | 2019 | 29:19.201 race | 33:36.001 race | +14.60% |
| Gavin Shan | 2019 | 22:00.002 races | 27:39.001 race | +25.68% |