Pairwise course analysis
BB&N 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 slower
+3.71%
Roughly 44.5 seconds slower for a 20:00 runner
Paired observations
126
Deep evidence
Median difference
+3.47%
Middle runner-season comparison
Overall estimate
+3.71%
Network-adjusted course estimate
Middle 50% range
+4.51%
Observed variation (IQR)
Direction and magnitude
Relative course speed
Groton School fasterEvenGroton School slower
Confidence interval
+2.71% to +4.18%
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 | BB&N 5K Course | Groton School | Difference |
|---|---|---|---|---|
| Mattia Farmer | 2024 | 31:09.001 race | 27:47.001 race | -10.81% |
| Elsbeth Kasparian | 2024 | 31:31.001 race | 28:24.001 race | -9.89% |
| Charles Chen | 2019 | 23:54.003 races | 21:45.001 race | -9.00% |
| Kaia Eckton | 2019 | 30:45.002 races | 28:16.001 race | -8.08% |
| Sebastian Southworth | 2024 | 26:05.001 race | 24:52.001 race | -4.66% |
| Nathan Ma | 2024 | 24:27.001 race | 23:44.001 race | -2.93% |
| Oscar Caprano | 2019 | 22:20.002 races | 21:43.001 race | -2.76% |
| Zoe Pincus | 2024 | 24:49.001 race | 24:09.001 race | -2.69% |
| Gabriela Gill | 2023 | 22:08.001 race | 21:40.003 races | -2.11% |
| Asher Parker-Sartori | 2019 | 25:09.003 races | 24:48.001 race | -1.39% |
| Violet Zhang | 2024 | 26:36.001 race | 26:16.001 race | -1.25% |
| Alex Avram | 2019 | 25:12.003 races | 24:54.001 race | -1.19% |
| Sam Modur | 2019 | 22:55.002 races | 22:41.001 race | -1.02% |
| Lindy Zhang | 2023 | 21:34.001 race | 21:25.003 races | -0.70% |
| Ben Kaplan | 2024 | 24:26.001 race | 24:19.001 race | -0.48% |
| Ines Levy | 2019 | 21:36.001 race | 21:30.001 race | -0.46% |
| Andreas Bai | 2024 | 23:33.001 race | 23:29.001 race | -0.28% |
| Julian Li | 2019 | 18:55.003 races | 18:52.001 race | -0.26% |
| Onyeka Nwulia | 2023 | 31:09.001 race | 31:10.001 race | +0.05% |
| Natalie Sun | 2023 | 24:51.001 race | 24:53.002 races | +0.13% |
| Alex Wu | 2019 | 18:01.003 races | 18:03.001 race | +0.19% |
| Sam Rabieh | 2019 | 17:18.002 races | 17:20.001 race | +0.19% |
| Penelope Tregoe | 2023 | 22:58.001 race | 23:01.002 races | +0.22% |
| Konstantin Lukin-Yelin | 2019 | 18:41.003 races | 18:45.001 race | +0.36% |
| Leila Blake | 2024 | 21:16.001 race | 21:23.001 race | +0.55% |
| Mirabel Ge | 2024 | 26:00.001 race | 26:09.001 race | +0.58% |
| Aryan Mago | 2023 | 20:53.001 race | 21:12.003 races | +1.52% |
| Liv Ding | 2023 | 24:37.001 race | 25:00.002 races | +1.56% |
| Chase Bellamy | 2023 | 19:11.001 race | 19:29.003 races | +1.56% |
| Zane Davis | 2019 | 21:51.003 races | 22:12.001 race | +1.60% |
| Caroline Kovacs | 2022 | 20:38.001 race | 20:58.001 race | +1.62% |
| Eric Ge | 2023 | 18:07.001 race | 18:25.003 races | +1.66% |
| Mathew Hong | 2019 | 18:17.003 races | 18:36.001 race | +1.73% |
| David Xiong | 2022 | 19:09.002 races | 19:30.001 race | +1.83% |
| David Yu | 2023 | 23:03.001 race | 23:29.003 races | +1.88% |
| Alexandra Nicholas | 2022 | 24:14.001 race | 24:43.001 race | +1.99% |
| Ford Legg | 2019 | 20:15.002 races | 20:40.001 race | +2.06% |
| Finley Long | 2024 | 18:47.001 race | 19:11.001 race | +2.13% |
| Ford Legg | 2022 | 19:27.002 races | 19:53.001 race | +2.23% |
| Andrew Monsalve | 2019 | 20:09.003 races | 20:37.001 race | +2.32% |
| Kathryn Martin | 2024 | 22:48.001 race | 23:20.001 race | +2.34% |
| Gabe Cooper | 2024 | 18:45.001 race | 19:12.001 race | +2.40% |
| Ellie Berman | 2019 | 23:01.002 races | 23:35.001 race | +2.46% |
| Alexander Cohen | 2022 | 25:10.001 race | 25:48.001 race | +2.52% |
| Damien West | 2023 | 17:52.001 race | 18:19.002 races | +2.52% |
| Charlie Zhang | 2024 | 20:57.001 race | 21:29.001 race | +2.55% |
| Viola Shepard | 2024 | 26:41.001 race | 27:22.001 race | +2.56% |
| Naomi Hammerschlag | 2024 | 20:55.001 race | 21:28.001 race | +2.63% |
| Amory Forman | 2024 | 19:30.001 race | 20:01.001 race | +2.65% |
| Priya Devavaeam | 2019 | 24:33.002 races | 25:13.001 race | +2.72% |
| Sahovan Modi | 2023 | 20:38.001 race | 21:12.003 races | +2.75% |
| Theo Goldman | 2019 | 20:35.003 races | 21:09.001 race | +2.75% |
| Liam Warren | 2023 | 18:40.001 race | 19:11.003 races | +2.77% |
| Keenan Billings | 2022 | 18:49.002 races | 19:21.001 race | +2.83% |
| Kristin Qin | 2023 | 25:20.001 race | 26:05.003 races | +2.96% |
| Ekaum Soni | 2019 | 29:02.001 race | 29:55.001 race | +3.04% |
| Henry Sielheimer | 2023 | 21:17.001 race | 21:59.001 race | +3.29% |
| Abigail Rabieh | 2019 | 22:23.001 race | 23:08.001 race | +3.35% |
| Flynn Coyne | 2022 | 21:36.002 races | 22:20.001 race | +3.40% |
| Christopher Hovet | 2023 | 16:05.001 race | 16:38.003 races | +3.42% |
| Vivian Cain-Weingram | 2024 | 20:57.001 race | 21:40.001 race | +3.42% |
| Tori Reece | 2023 | 23:50.001 race | 24:39.003 races | +3.43% |
| Charlie Zhang | 2022 | 23:15.001 race | 24:03.001 race | +3.44% |
| Julia Wang | 2022 | 25:11.001 race | 26:04.001 race | +3.51% |
| Sylvia Brennan | 2022 | 21:14.002 races | 22:00.001 race | +3.61% |
| Parker Lewis-Pierce | 2022 | 22:35.001 race | 23:25.001 race | +3.69% |
| Augustus Hawk | 2019 | 20:02.003 races | 20:47.001 race | +3.74% |
| Caroline Creasy | 2023 | 22:09.001 race | 23:00.003 races | +3.84% |
| Thaddaeus Flatz-Ehrfeld | 2023 | 19:29.001 race | 20:14.003 races | +3.85% |
| Juwon Lee | 2023 | 26:41.001 race | 27:43.001 race | +3.87% |
| Kathryn Martin | 2022 | 23:57.001 race | 24:53.001 race | +3.90% |
| Nicholas Tao | 2019 | 18:58.003 races | 19:43.001 race | +3.95% |
| Jeremy Gall | 2023 | 18:18.001 race | 19:03.003 races | +4.10% |
| Christian Hernandez | 2022 | 22:28.001 race | 23:24.001 race | +4.15% |
| Walker Cox | 2022 | 22:22.001 race | 23:18.001 race | +4.17% |
| Sarah Ku | 2023 | 25:10.001 race | 26:14.002 races | +4.24% |
| Alana Kramer-Gomez | 2022 | 21:27.001 race | 22:22.001 race | +4.27% |
| Scarlett Hawkins | 2024 | 19:02.001 race | 19:51.001 race | +4.29% |
| Ryan Loughran | 2019 | 18:00.003 races | 18:48.001 race | +4.44% |
| Raymond Hildreth | 2023 | 19:09.001 race | 20:01.003 races | +4.53% |
| Christian Batemen | 2019 | 19:37.003 races | 20:31.001 race | +4.59% |
| Joshua Curhan | 2024 | 17:25.001 race | 18:13.001 race | +4.59% |
| Jonathan Andreoli | 2022 | 23:11.001 race | 24:16.001 race | +4.67% |
| Flynn Coyne | 2019 | 23:32.003 races | 24:38.001 race | +4.67% |
| Eliot Saad | 2024 | 18:29.001 race | 19:21.001 race | +4.69% |
| Philip Holland | 2023 | 19:53.001 race | 20:49.003 races | +4.69% |
| David Xiong | 2024 | 17:15.001 race | 18:08.001 race | +5.12% |
| Mikayla Higgins | 2022 | 25:26.001 race | 26:45.001 race | +5.18% |
| Katie Chen | 2019 | 21:53.003 races | 23:01.001 race | +5.18% |
| Carla Granizo | 2023 | 31:16.001 race | 32:54.001 race | +5.22% |
| Julia Maimones | 2019 | 21:44.002 races | 22:53.001 race | +5.29% |
| Sydney Nelson | 2023 | 23:57.001 race | 25:15.002 races | +5.43% |
| Audra Soni | 2022 | 23:13.002 races | 24:32.001 race | +5.67% |
| Joshua Curhan | 2022 | 18:30.002 races | 19:37.001 race | +6.04% |
| Noah Ditzion | 2024 | 23:24.001 race | 24:53.001 race | +6.34% |
| Walker Cox | 2024 | 19:01.001 race | 20:15.001 race | +6.49% |
| Keenan Billings | 2024 | 16:45.001 race | 17:51.001 race | +6.57% |
| Noah Avram | 2024 | 21:58.001 race | 23:25.001 race | +6.60% |
| Owen Dowden | 2019 | 25:02.003 races | 26:42.001 race | +6.66% |
| Sam Modur | 2022 | 20:14.001 race | 21:35.001 race | +6.67% |
| Gabe Cooper | 2022 | 18:36.002 races | 19:51.001 race | +6.72% |
| Diego Abadie | 2022 | 19:35.002 races | 20:54.001 race | +6.72% |
| Lucas Liu | 2022 | 19:29.001 race | 20:51.001 race | +7.01% |
| Beckett Dubovik | 2022 | 20:28.001 race | 21:57.001 race | +7.25% |
| Olivia Knight | 2019 | 19:23.003 races | 20:48.001 race | +7.31% |
| Stephanie Mo | 2023 | 25:34.001 race | 27:28.002 races | +7.43% |
| Gabrielle Martin | 2022 | 23:09.001 race | 24:55.001 race | +7.63% |
| Douglas Zhang | 2022 | 20:52.001 race | 22:29.001 race | +7.75% |
| Mateo Garciarramos-Petrici | 2023 | 22:22.001 race | 24:07.003 races | +7.82% |
| Nina Khera | 2022 | 24:38.001 race | 26:34.001 race | +7.85% |
| Tim Guan | 2019 | 24:58.002 races | 26:56.001 race | +7.88% |
| Jake Elkins | 2019 | 18:14.003 races | 19:41.001 race | +7.95% |
| Andreu Beltran | 2024 | 17:08.001 race | 18:30.001 race | +7.98% |
| Michael Lu | 2023 | 19:14.001 race | 20:47.003 races | +8.06% |
| Arden Conine | 2019 | 22:52.003 races | 24:45.001 race | +8.24% |
| David Moon | 2024 | 21:25.001 race | 23:24.001 race | +9.26% |
| Noah Corso | 2024 | 19:33.001 race | 21:27.001 race | +9.72% |
| Anna Garvey | 2019 | 22:24.003 races | 24:35.001 race | +9.75% |
| Ben Kaplan | 2022 | 23:36.001 race | 25:55.001 race | +9.82% |
| Justin Hildebrandt | 2024 | 21:31.001 race | 23:39.001 race | +9.91% |
| Elizabeth Nicholas | 2024 | 21:47.001 race | 23:57.001 race | +9.95% |
| Idrissa Fall | 2024 | 21:01.001 race | 23:10.001 race | +10.23% |
| David Zhou | 2024 | 24:23.001 race | 26:56.001 race | +10.46% |
| Peilin Li | 2024 | 21:54.001 race | 24:19.001 race | +11.04% |
| Sebastian Southworth | 2022 | 22:03.001 race | 24:54.001 race | +12.93% |
| David Min | 2019 | 25:48.001 race | 29:47.001 race | +15.44% |