Tryptophan Half/10K/5K 2026
- Date
- Thursday, November 26, 2026
- Start time
- 7:30 AM start (New York)
- Location
- Cumming, Georgia
- Entry fee
- From $20 · goes up to $60 on Oct 11, 2026
- Included with entry
- Includes a shirt
Registration is open.
Likely to sell out. 165 finished the 10K in 2025, and this year's cap is 166.
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Events and entry fees
| Event | Distance | When | Entry fee | Cap |
|---|---|---|---|---|
| Half Marathon | Half Marathon | Nov 26, 20267:30 AM | $55$60 after Oct 11, 2026 | 145 |
| 10K | 10K | Nov 26, 20267:45 AM | $35$40 after Oct 11, 2026 | 166 |
| 5K | 5K | Nov 26, 20268:00 AM | $30$35 after Oct 11, 2026 | 430 |
| Fun Run 1K | Kids | Nov 26, 20269:00 AM | $20 | 30 |
| Virtual TryptophanVirtual | – | Nov 26, 20267:30 AM | $40 | – |
Entry fees exclude processing fees. Prices and dates come from the race's registration page and refresh nightly.
The Half Marathon fee goes up to $60 on Oct 11, 2026.
Race day planning
Entry fee schedule
- Half Marathon: $55 until Oct 10, then $60 until Oct 27, then $65 until Nov 17, then $70 until Nov 24.
- 10K: $35 until Oct 10, then $40 until Oct 27, then $45 until Nov 17, then $50 until Nov 24.
- 5K: $30 until Oct 10, then $35 until Oct 27, then $40 until Nov 17, then $45 until Nov 24.
- Fun Run 1K: $20 until Nov 24.
Online registration closes Nov 24, 2026, unless the race fills first.
How the price compares
At $55, entry is about the same as a typical half marathon in Georgia ($60).
What a typical finish looks like
A typical finisher at a half marathon in Cumming runs 2:03:28, about 9:25 a mile, based on 4 races with published results. Women typically finish in 2:20:34 and men in 1:56:26.
Light and altitude
Sunrise on race morning is at about 7:19 AM, and the Half Marathon starts at 7:30 AM. The start sits about 1,060 feet above sea level.
Fees exclude processing fees. Comparisons use current entry fees and published results from races nearby.
Start location and course
415 Peachtree Parkway STE 200, Cumming, GA 30041
The pin marks the address the race lists, which is usually the start. The organizers have not shared a course map with us yet.
2025 results
All results (3 years)5K
10K
Half Marathon
Aggregated from official results (FAST) for Tryptophan Half/10K/5K. Individual finisher names are not stored here.
How fast do you need to be at Tryptophan Half/10K/5K?
At the 2025 5K, the fastest tenth finished in 25:02 or better, the top quarter in 29:35, and half the field in 36:54; the last tenth came in after 54:06.
At the 2025 10K, the fastest tenth finished in 49:25 or better, the top quarter in 54:59, and half the field in 1:01:05; the last tenth came in after 1:30:20.
At the 2025 Half Marathon, the fastest tenth finished in 1:42:02 or better, the top quarter in 1:49:17, and half the field in 2:00:38; the last tenth came in after 2:36:40.
| Age | Women | Men |
|---|---|---|
| Under 20 | 23:06 | 20:31 |
| 20-29 | 25:09 | 19:50 |
| 30-39 | 29:39 | 21:11 |
| 40-49 | 29:36 | 23:54 |
| 50-59 | 29:05 | 25:11 |
| 60-69 | 32:39 | 28:11 |
| 70+ | n/a | 43:23 |
Groups with fewer than five finishers are left out. Awards vary by race; check the race's rules.
What would my time get me?
Where a finish time would have placed in 2025.
Finishers by year
Up 31 percent since 2023.
All events combined, from official results.
Tryptophan Half/10K/5K 5K year by year
From 2023 to 2025, the field went from 372 to 419 finishers, and the median time rose from 33:17 to 36:54.
| Year | Finishers | Median | Fastest tenth | Winner |
|---|---|---|---|---|
| 2025 | 419 (-2%) | 36:54 | under 25:02 | 15:52 |
| 2024 | 426 (+15%) | 37:09 | under 24:22 | 15:47 |
| 2023 | 372 | 33:17 | under 24:10 | 16:42 |
From each year's official results for the 5K; virtual options are left out.
How fast is it?
About average for Georgia 5Ks
The fastest quarter of the 2025 5K field finished under 29:35, against 29:30 in a typical Georgia 5K, so times here are about average.
- 10K: About average for Georgia 10Ks. The fastest quarter of the 2025 10K field finished under 54:59, against 54:39 in a typical Georgia 10K, so times here are about average.
- Half Marathon: Faster than most Georgia half marathons. The fastest quarter of the 2025 half marathon field finished under 1:49:17, against 1:54:35 in a typical Georgia half marathon, so times here run 5 percent faster.
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.
Typical race-day weather
Around November 26 the day usually runs from 40°F at dawn to 58°F in the afternoon, with measurable rain on about 28% of days. Cold snaps dip to 33°F and hot years reach 67°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.
Race details
- Where
- 415 Peachtree Parkway STE 200, Cumming, GA 30041Map
- Course
- Road
- Start elevation
- About 1,060 feet
- Included with entry
- T-Shirt
- Distances
- 5K, 10K, Half Marathon, Kids
- Editions
- 2026 (Nov 26, 2026), 2025 (Nov 27, 2025), 2024 (Nov 28, 2024), 2023 (Nov 23, 2023)
Organize this race? Add details or a correction
Plan your race
Quick answers
- When is Tryptophan Half/10K/5K?
- Thursday, November 26, 2026, starting at 7:30 AM.
- How much does it cost?
- Entry starts at $20 before processing fees, and rises to $60 on Oct 11, 2026.
- When does registration close?
- Online registration closes Nov 24, 2026, unless the race fills first.
- Is the entry fee high for Georgia?
- At $55, entry is about the same as a typical half marathon in Georgia ($60).
- Do runners get a shirt or medal?
- Entry includes a shirt, according to the race's registration page. Check it for sizes and whether kids' races get the same.
- What distances can I run?
- 5K, 10K, Half Marathon, Kids.
- How big is it, and how fast?
- In 2025, 419 runners finished the 5K; the median finish was 36:54 and the winner ran 15:52.
- Does it sell out?
- It can. 165 runners finished the 10K in 2025, close to this year's cap of 166, so register early.
- Is it a fast course?
- The fastest quarter of the 2025 5K field finished under 29:35, against 29:30 in a typical Georgia 5K, so times here are about average.
- Where does it start?
- 415 Peachtree Parkway STE 200, Cumming, GA 30041.
From the organizers
Join us on Thanksgiving Day. Come out and burn some pre-turkey calories while working up an appetite for your Thanksgiving Day feast by running or walking the 16th annual Tryptophan Half Marathon, 10K, or 5K.
WOW, 16 years is an amazing tradition! We are THANKFUL to all of YOU for coming out year after year. It is great to see family and friends come together from all over to create special memories on race day! So be THAT FAMILY on turkey day and run a 5K, 10K or Half Marathon run/walk.