Boston Marathon logo
BOSTON MARATHON 2023

Kevin Stacy

Bib: 4219•M

TX

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 22%
Gender (Male)
#0 / 15176
Top 35%
Division (M18-39)
#0 / 5285
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:57
Rank: #4074
Start → 5K
20:57 | 6:45/mi
10K· 6.21 mi
41:39
Rank: #4017 (+57)
5K → 10K
20:42 | 6:40/mi
15K· 9.32 mi
1:02:25
Rank: #3986 (+31)
10K → 15K
20:46 | 6:41/mi
20K· 12.43 mi
1:23:21
Rank: #3937 (+49)
15K → 20K
20:56 | 6:44/mi
Half· 13.11 mi
1:27:56
Rank: #3964 (-27)
20K → Half
4:35 | 6:43/mi
25K· 15.53 mi
1:44:28
Rank: #4012 (-48)
Half → 25K
16:32 | 6:49/mi
30K· 18.64 mi
2:06:30
Rank: #4181 (-169)
25K → 30K
22:02 | 7:06/mi
20M
2:16:31
Rank: #4385 (-204)
30K → 20M
10:01 | 7:22/mi
21M
2:24:25
Rank: #4556 (-171)
20M → 21M
7:54 | 7:54/mi
35K· 21.75 mi
2:30:05
Rank: #4725 (-169)
21M → 35K
5:40 | 7:34/mi
23M
2:40:11
Rank: #5017 (-292)
35K → 23M
10:06 | 8:04/mi
24M
2:48:30
Rank: #5275 (-258)
23M → 24M
8:19 | 8:19/mi
40K· 24.85 mi
2:55:56
Rank: #5517 (-242)
24M → 40K
7:26 | 8:42/mi
25.2M
2:59:10
Rank: #5614 (-97)
40K → 25.2M
3:14 | 9:23/mi
Finish· 26.22 mi
3:08:03
Rank: #5947 (-333)
25.2M → Finish
8:53 | 8:43/mi

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:27:56
Pace6:42 /mi
2nd Half
Distance13.11 mi
Time1:40:07
Pace7:38 /mi
📊Positive Split: 13.9% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:1120:576:4520:57
6:45
-
10K
6.21 mi10:43:5341:396:4220:42
6:40
-0:05
15K
9.32 mi11:04:391:02:256:4220:46
6:41
+0:01
20K
12.43 mi11:25:351:23:216:4220:56
6:44
+0:03
Half
13.11 mi11:30:101:27:566:424:35
6:43
-0:01
25K
15.53 mi11:46:421:44:286:4316:32
6:49
+0:06
30K
18.64 mi12:08:442:06:306:4722:02
7:06
+0:17
20M
20.00 mi12:18:452:16:316:5010:01
7:22
+0:16
21M
21.00 mi12:26:392:24:256:537:54
7:54
+0:32
35K
21.75 mi12:32:192:30:056:545:40
7:34
-0:20
23M
23.00 mi12:42:252:40:116:5810:06
8:04
+0:30
24M
24.00 mi12:50:442:48:307:018:19
8:19
+0:15
40K
24.85 mi12:58:102:55:567:057:26
8:42
+0:23
25.2M
25.20 mi13:01:242:59:107:073:14
9:23
+0:41
Finish
26.22 mi13:10:173:08:037:118:53
8:43
-0:40

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

6:40 /mi

Average Pace

7:11 /mi

Slowest Pace

9:23 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:44:28

56% of race

Time at Steady Pace

37:43

20% of race

Time at Slower Pace

45:52

24% of race

Average Pace: 7:10 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:23:1120:576:4520:57
6:45
#4074
10K
6.21 mi10:43:5341:396:4220:42
6:40
#4017
15K
9.32 mi11:04:391:02:256:4220:46
6:41
#3986
20K
12.43 mi11:25:351:23:216:4220:56
6:44
#3937
Half
13.11 mi11:30:101:27:566:424:35
6:43
#3964
25K
15.53 mi11:46:421:44:286:4316:32
6:49
#4012
30K
18.64 mi12:08:442:06:306:4722:02
7:06
#4181
20M
20.00 mi12:18:452:16:316:5010:01
7:22
#4385
21M
21.00 mi12:26:392:24:256:537:54
7:54
#4556
35K
21.75 mi12:32:192:30:056:545:40
7:34
#4725
23M
23.00 mi12:42:252:40:116:5810:06
8:04
#5017
24M
24.00 mi12:50:442:48:307:018:19
8:19
#5275
40K
24.85 mi12:58:102:55:567:057:26
8:42
#5517
25.2M
25.20 mi13:01:242:59:107:073:14
9:23
#5614
Finish
26.22 mi13:10:173:08:037:118:53
8:43
#5947
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi4074382138213994(Top 15%)3755(Top 25%)3755(Top 71%)
10K6.21 mi3.10 mi4017+573778+433778+433997(Top 15%)3763(Top 25%)3763(Top 71%)
15K9.32 mi3.11 mi3986+313753+253753+253994(Top 15%)3755(Top 25%)3755(Top 71%)
20K12.43 mi3.11 mi3937+493706+473706+473890(Top 15%)3670(Top 24%)3670(Top 69%)
Half13.11 mi0.68 mi3964-273729-233729-234592(Top 17%)4284(Top 28%)4284(Top 81%)
25K15.53 mi2.42 mi4012-483775-463775-464333(Top 16%)4049(Top 27%)4049(Top 77%)
30K18.64 mi3.11 mi4181-1693928-1533928-1534897(Top 18%)4509(Top 30%)4509(Top 85%)
20M20.00 mi1.36 mi4385-2044094-1664094-1666027(Top 23%)5312(Top 35%)5312(Top 101%)
21M21.00 mi1.00 mi4556-1714248-1544248-1546697(Top 25%)5666(Top 37%)5666(Top 107%)
35K21.75 mi0.75 mi4725-1694396-1484396-1489022(Top 34%)7065(Top 47%)7065(Top 134%)
23M23.00 mi1.25 mi5017-2924627-2314627-23110189(Top 38%)7570(Top 50%)7570(Top 143%)
24M24.00 mi1.00 mi5275-2584842-2154842-21513291(Top 50%)8990(Top 59%)8990(Top 170%)
40K24.85 mi0.85 mi5517-2425026-1845026-18414430(Top 54%)9415(Top 62%)9415(Top 178%)
25.2M25.20 mi0.35 mi5614-975097-715097-7114467(Top 54%)9423(Top 62%)9423(Top 178%)
Finish26.22 mi1.02 mi5947-3335342-2455342-24516538(Top 62%)10390(Top 68%)10390(Top 197%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 15%
×21stories
+97ft-345ft

Overall

3994

Males

3755

M18-39

3755

5K→10K

3.1 - 6.2 mi

Top 15%
×5stories
+79ft-138ft

Overall

3997

Males

3763

M18-39

3763

10K→15K

6.2 - 9.3 mi

Top 15%
×3stories
+67ft-78ft

Overall

3994

Males

3755

M18-39

3755

15K→20K

9.3 - 12.4 mi

Top 15%
×5stories
+106ft-86ft

Overall

3890

Males

3670

M18-39

3670

20K→Half

12.4 - 13.1 mi

Top 17%
×2stories
+19ft-37ft

Overall

4592

Males

4284

M18-39

4284

Half→25K

13.1 - 15.5 mi

Top 16%
×4stories
+66ft-88ft

Overall

4333

Males

4049

M18-39

4049

25K→30K

15.5 - 18.6 mi

Top 18%
×9stories
+181ft-148ft

Overall

4897

Males

4509

M18-39

4509

30K→20M

18.6 - 20.0 mi

Top 23%
×5stories
+64ft-50ft

Overall

6027

Males

5312

M18-39

5312

20M→21M

20.0 - 21.0 mi

Top 25%
×8stories
+106ft-24ft

Overall

6697

Males

5666

M18-39

5666

21M→35K

21.0 - 21.8 mi

Top 34%
×7stories
+17ft-86ft

Overall

9022

Males

7065

M18-39

7065

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10189

Males

7570

M18-39

7570

23M→24M

23.0 - 24.0 mi

Top 50%
×6stories
+12ft-82ft

Overall

13291

Males

8990

M18-39

8990

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14430

Males

9415

M18-39

9415

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

14467

Males

9423

M18-39

9423

25.2M→Finish

25.2 - 26.2 mi

Top 62%
×2stories
+22ft-21ft

Overall

16538

Males

10390

M18-39

10390

Passing Analysis

Category:
Athletes Passed
788
Passed By
2661
Net Change
-1873
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#4074
5K → 10K259202+57#4074#4017
10K → 15K12998+31#4017#3986
15K → 20K13788+49#3986#3937
20K → Half1340-27#3937#3964
Half → 25K61109-48#3964#4012
25K → 30K68237-169#4012#4181
30K → 20M22226-204#4181#4385
20M → 21M26197-171#4385#4556
21M → 35K15184-169#4556#4725
35K → 23M23315-292#4725#5017
23M → 24M11269-258#5017#5275
24M → 40K9251-242#5275#5517
40K → 25.2M4101-97#5517#5614
25.2M → Finish11344-333#5614#5947
TOTALS7882661-1873
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing