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| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Adult Mucker | Other | Oct 3, 20262:30 PM | $55$60 after Sep 30, 2026 | – |
| Adult Mucker | ACCESS by ArtReach ONLY | Other | Oct 3, 20262:30 PM | $2 | 10 |
| Adult Runner | 5K | Oct 3, 20262:30 PM | $55$60 after Sep 30, 2026 | – |
| Adult Runner | ACCESS by ArtReach ONLY | 5K | Oct 3, 20262:30 PM | $2 | 10 |
| Adult Spectator | – | Oct 3, 20262:30 PM | $55$60 after Sep 30, 2026 | – |
| Adult Spectator | ACCESS by ArtReach ONLY | – | Oct 3, 20262:30 PM | $2 | 10 |
| Future Runner! | – | Oct 3, 20262:30 PM | Free | – |
| Future Runner! | ACCESS by ArtReach ONLY | – | Oct 3, 20262:30 PM | Free | – |
| Youth Mucker | Kids | Oct 3, 20262:30 PM | $25$30 after Sep 30, 2026 | – |
| Youth Mucker | ACCESS by ArtReach ONLY | Kids | Oct 3, 20262:30 PM | $2 | 10 |
| Youth Runner | 5K | Oct 3, 20262:30 PM | $25$30 after Sep 30, 2026 | – |
| Youth Runner | ACCESS by ArtReach ONLY | 5K | Oct 3, 20262:30 PM | $2 | 10 |
| Youth Spectator | Kids | Oct 3, 20262:30 PM | $25$30 after Sep 30, 2026 | – |
| Youth Spectator | ACCESS by ArtReach ONLY | Kids | Oct 3, 20262:30 PM | $2 | 10 |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Other fee goes up to $60 on Sep 30, 2026.
Online registration closes Oct 3, 2026, unless the race fills first.
At $55, entry is about 83 percent above a typical 5K in Pennsylvania, which costs $30 right now.
A typical finisher at a 5K in Pennsylvania runs 36:27, about 11:44 a mile, based on 39 races with published results. Women typically finish in 38:17 and men in 33:16.
Sunrise on race morning is at about 6:58 AM, and the Adult Mucker starts at 2:30 PM. The start sits about 390 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
6114 Goshen Road, Newtown Square, PA 19073
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
Aggregated from official results (Bryn Mawr Racing Company) for Run-a-Muck with Willistown Conservation Trust. Individual finisher names are not stored here.
In 2025, the fastest tenth finished in 27:17 or better, the top quarter in 32:31, and half the field in 36:11; the last tenth came in after 47:49.
| Age | Women | Men |
|---|---|---|
| Under 20 | 30:31 | 27:14 |
| 20-29 | 37:40 | n/a |
| 30-39 | 33:46 | 26:01 |
| 40-49 | 34:08 | 28:17 |
| 50-59 | 42:22 | 27:15 |
| 60-69 | n/a | 35:04 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
Where a finish time would have placed in 2025.
Up 22 percent since 2021.
All events combined, from official results.
From 2021 to 2025, the field went from 116 to 141 finishers, and the median time rose from 34:57 to 36:11.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2025 | 141 (-3%) | 36:11 | under 27:17 | 20:21 |
| 2024 | 146 (+36%) | 33:33 | under 24:39 | 18:35 |
| 2023 | 107 (-17%) | 36:10 | under 25:26 | 19:31 |
| 2022 | 129 (+11%) | 36:54 | under 25:29 | 21:53 |
| 2021 | 116 | 34:57 | under 27:01 | 22:11 |
From each year's official results for the 5K; virtual options are left out.
Slower than most Pennsylvania trail 5Ks
The fastest quarter of the 2025 5K field finished under 32:31, against 29:32 in a typical Pennsylvania trail 5K, so times here run 10 percent slower.
Compares the fastest quarter of each field, so walkers and first-timers do not skew it. It reflects the course and the field together: a flat course, cool weather, or a competitive crowd all make times faster.
Around October 3 the day usually runs from 56°F at dawn to 70°F in the afternoon, with measurable rain on about 19% of days. Cold snaps dip to 45°F and hot years reach 79°F.
Based on 75 days within a week of the date over the last 5 years, from historical weather for the start area. Not a forecast.
What the organizers of Run-a-Muck with Willistown Conservation Trust cover on their registration page, in brief.
Rules and FAQ
Attendance at Willistown Conservation Trust programs and events constitutes consent to be photographed for print and electronic media use. Images will not be identified using full names without written approval from the individual. Please…
The cause
The ACCESS program provides discounted admission to over 85 cultural sites throughout Greater Philadelphia and Delaware for individuals receiving public assistance for food or medical benefits and individuals who self-identify as having a…
Organize this race? Add details or a correction
Run-a-Muck 2026 | Saturday, October 3, 2026
On Point Farm | Newtown Square, PA
Get Ready to Run. Muck (walk). Celebrate.
Experience one of Chester County's favorite fall traditions! Whether you're racing for a personal best or taking on the famous Mucker Course at your own pace, Run-A-Muck is an afternoon of outdoor fun, community, and conservation.
Challenge yourself on our scenic cross-country course featuring fields, woods, streams, hills, and plenty to see along the way. Then stick around to celebrate with great food, beer and wine, live music, a roaring bonfire, and activities for the whole family.
Every registration helps protect natural beauty, wildlife habitat, and open spaces.
Event Highlights
5K Cross-Country Run
Mucker Course (Walk)
Live Music