Grindstone Trail Running Festival - 100M, segment by segment

Your rank over 16 segments, vs runners at your level — 230 starters measured on the 2026 edition.

Grindstone Trail Running Festival - 100M, 169 km — the course whose 16 segments this page analyzes

Where did you stand?

Your bib or name is enough. Free, no account, no payment.

Free, no account. Your bib only helps us find your times, nothing else.

How to read this page

“Ahead of 62% of runners”
On this segment, 62 runners out of 100 at your level took longer than you. Statisticians call this the 62nd percentile; same thing. 100 = fastest, 0 = slowest.
“Your level”
The 60 runners whose UTMB Index is closest to yours, in the same edition. Not the winner, not the field average: people who run like you do. The index ranges from around 300 to 1,000.
“The median”
The time that splits the field in half: half did better, half did worse. Sturdier than an average, which a single very slow runner is enough to shift.
“The central half”
The shaded zone on the graph: between the fastest quarter and the slowest quarter. Half your group sits there. Staying in it from start to finish means you held your rank.
“The trend”
The solid line. Your rank bounces around segment to segment—a bathroom stop moves it. The trend smooths these jitters to show the real drift. The gray dots are your actual ranks, unretouched.
“A segment”
The section between two timing checkpoints. This race has 16, wildly different lengths—that's why the graph spaces them evenly instead of by kilometer.

Where runners drop out on Grindstone Trail Running Festival - 100M

109 of 230 starters didn't reach the finish, that's 47.4%. The median drop-out point is at km 53.15.

DNF count per checkpoint
CheckpointkmDNFs
Dry Branch Gap - 185.6335
Reddish Knob32.9731
North River Gap - 153.1527
Dowells Draft - 2116.495
Dry Branch Gap - 2105.483
Magic Moss125.153
Wolf Ridge18.633
Camp Todd133.232

Real times, segment by segment

Durations measured on starters from the 2026 edition, indices 362 to 746, median 506. The central half of the field runs from 25th to 75th percentile.

Duration of each segment: median and central half of the field
SegmentkmMedianCentral halfMeasured
Natural Chimneys → Lick Run - 19.241 h 0359 min – 1 h 08189
Lick Run - 1 → Wolf Ridge9.41 h 251 h 17 – 1 h 32189
Wolf Ridge → Reddish Knob14.332 h 442 h 28 – 2 h 58226
Reddish Knob → Little Bald Knob6.42—— – —0
Little Bald Knob → North River Gap - 113.76—— – —0
North River Gap - 1 → Lookout Mountain9.21—— – —0
Lookout Mountain → Dowells Draft - 112.2—— – —0
Dowells Draft - 1 → Dry Branch Gap - 111.081 h 511 h 44 – 1 h 58167
Dry Branch Gap - 1 → Cold Springs10.92—— – —0
Cold Springs → Dry Branch Gap - 28.93—— – —0
Dry Branch Gap - 2 → Dowells Draft - 2111 h 541 h 44 – 2 h 00129
Dowells Draft - 2 → Magic Moss8.662 h 292 h 15 – 2 h 38123
Magic Moss → Camp Todd8.081 h 341 h 23 – 1 h 42121
Camp Todd → North River Gap - 215.814 h 073 h 41 – 4 h 24119
North River Gap - 2 → Lick Run - 212.482 h 402 h 21 – 2 h 53108
Lick Run - 2 → Natural Chimneys7.111 h 1059 min – 1 h 20108

Questions about Grindstone Trail Running Festival - 100M

How many runners DNF on Grindstone Trail Running Festival - 100M?

109 of 230 starters didn’t reach the finish in the 2026 edition, i.e. 47.4%. Split times were recorded bib by bib from the official timing, which only publishes finishers. RAVIT survey of September 29, 2026.

Where do runners DNF on Grindstone Trail Running Festival - 100M?

Km 85.63: Dry Branch Gap - 1 accounts for 35 of 109 DNFs in the 2026 edition. Then Reddish Knob (31) and North River Gap - 1 (27); together, 93 DNFs. The last recorded checkpoint is definitive. Log from September 29, 2026.

What's the longest segment on Grindstone Trail Running Festival - 100M?

4 h 07 median: time from Camp Todd to North River Gap - 2, over 15.81 km, measured on 119 runners in the 2026 edition. The middle half of the field ran between 3 h 41 and 4 h 24. Log from September 29, 2026.

What's my time compared to on this page?

To 60 runners closest to your index, in a max 25-point index window, on the edition you pick. On each segment, the reference is runners who reached that checkpoint. DNFs count as long as they were racing.

Does this page compare my race to a prediction?

No, not here. This page compares your rank to that of real runners, segment by segment, with no predictions. Your gap to your own plan is shown in your plan debrief: on the Pacing screen, once your race is done.

Data from this page

Measurements for each edition are downloadable in CSV: one line per segment, with median, quartiles, number of runners measured and DNFs per checkpoint. Comma separator, point decimal, UTF-8 encoding. Reuse conditions for this data

Other races analyzed

Prepare for Grindstone Trail Running Festival - 100M: profile, aid stations and cut-off timesEvery race analyzed segment by segmentView all trail races in calendar

Where these numbers come from. Split times are logged checkpoint by checkpoint from the official race timing, then recalculated by segment. DNFs are reconstructed bib by bib; official results only publish finishers. Analysis by RAVIT — ravit.live, data from September 29, 2026.