Boston Marathon logo
BOSTON MARATHON 2023

Zachary Gray

Bib: 3744•M

IA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 5%
Gender (Male)
#0 / 15176
Top 9%
Division (M18-39)
#0 / 5285
Top 22%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:45
Rank: #3451
Start → 5K
20:45 | 6:41/mi
10K· 6.21 mi
40:55
Rank: #3029 (+422)
5K → 10K
20:10 | 6:29/mi
15K· 9.32 mi
1:00:47
Rank: #2649 (+380)
10K → 15K
19:52 | 6:24/mi
20K· 12.43 mi
1:20:43
Rank: #2413 (+236)
15K → 20K
19:56 | 6:25/mi
Half· 13.11 mi
1:25:02
Rank: #2389 (+24)
20K → Half
4:19 | 6:20/mi
25K· 15.53 mi
1:40:30
Rank: #2246 (+143)
Half → 25K
15:28 | 6:23/mi
30K· 18.64 mi
2:00:10
Rank: #1941 (+305)
25K → 30K
19:40 | 6:20/mi
20M
2:09:00
Rank: #1894 (+47)
30K → 20M
8:50 | 6:30/mi
21M
2:15:41
Rank: #1823 (+71)
20M → 21M
6:41 | 6:41/mi
35K· 21.75 mi
2:20:10
Rank: #1745 (+78)
21M → 35K
4:29 | 6:00/mi
23M
2:27:49
Rank: #1625 (+120)
35K → 23M
7:39 | 6:07/mi
24M
2:33:57
Rank: #1563 (+62)
23M → 24M
6:08 | 6:08/mi
40K· 24.85 mi
2:39:22
Rank: #1524 (+39)
24M → 40K
5:25 | 6:20/mi
25.2M
2:41:39
Rank: #1505 (+19)
40K → 25.2M
2:17 | 6:37/mi
Finish· 26.22 mi
2:47:53
Rank: #1462 (+43)
25.2M → Finish
6:14 | 6:07/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 Half
Distance13.11 mi
Time1:25:02
Pace6:29 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:22:51
Pace6:19 /mi
📊Negative Split: 2.6% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:21:5620:456:4120:45
6:41
-
10K
6.21 mi10:42:0640:556:3520:10
6:29
-0:12
15K
9.32 mi11:01:581:00:476:3119:52
6:24
-0:05
20K
12.43 mi11:21:541:20:436:3019:56
6:25
+0:01
Half
13.11 mi11:26:131:25:026:294:19
6:20
-0:05
25K
15.53 mi11:41:411:40:306:2815:28
6:23
+0:03
30K
18.64 mi12:01:212:00:106:2719:40
6:20
-0:03
20M
20.00 mi12:10:112:09:006:278:50
6:30
+0:10
21M
21.00 mi12:16:522:15:416:286:41
6:41
+0:11
35K
21.75 mi12:21:212:20:106:274:29
6:00
-0:41
23M
23.00 mi12:29:002:27:496:267:39
6:07
+0:07
24M
24.00 mi12:35:082:33:576:256:08
6:08
+0:01
40K
24.85 mi12:40:332:39:226:255:25
6:20
+0:12
25.2M
25.20 mi12:42:502:41:396:252:17
6:37
+0:17
Finish
26.22 mi12:49:042:47:536:246:14
6:07
-0:30

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

6:00 /mi

Average Pace

6:24 /mi

Slowest Pace

6:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:18:10

82% of race

Time at Steady Pace

29:43

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:24 /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 mi10:21:5620:456:4120:45
6:41
#3451
10K
6.21 mi10:42:0640:556:3520:10
6:29
#3029
15K
9.32 mi11:01:581:00:476:3119:52
6:24
#2649
20K
12.43 mi11:21:541:20:436:3019:56
6:25
#2413
Half
13.11 mi11:26:131:25:026:294:19
6:20
#2389
25K
15.53 mi11:41:411:40:306:2815:28
6:23
#2246
30K
18.64 mi12:01:212:00:106:2719:40
6:20
#1941
20M
20.00 mi12:10:112:09:006:278:50
6:30
#1894
21M
21.00 mi12:16:522:15:416:286:41
6:41
#1823
35K
21.75 mi12:21:212:20:106:274:29
6:00
#1745
23M
23.00 mi12:29:002:27:496:267:39
6:07
#1625
24M
24.00 mi12:35:082:33:576:256:08
6:08
#1563
40K
24.85 mi12:40:332:39:226:255:25
6:20
#1524
25.2M
25.20 mi12:42:502:41:396:252:17
6:37
#1505
Finish
26.22 mi12:49:042:47:536:246:14
6:07
#1462
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi3451325232522056(Top 8%)1971(Top 13%)1971(Top 37%)
10K6.21 mi3.10 mi3029+4222884+3682884+3682717(Top 10%)2598(Top 17%)2598(Top 49%)
15K9.32 mi3.11 mi2649+3802530+3542530+3542056(Top 8%)1971(Top 13%)1971(Top 37%)
20K12.43 mi3.11 mi2413+2362311+2192311+2191858(Top 7%)1781(Top 12%)1781(Top 34%)
Half13.11 mi0.68 mi2389+242289+222289+221848(Top 7%)1773(Top 12%)1773(Top 34%)
25K15.53 mi2.42 mi2246+1432153+1362153+1361635(Top 6%)1565(Top 10%)1565(Top 30%)
30K18.64 mi3.11 mi1941+3051858+2951858+2951000(Top 4%)951(Top 6%)951(Top 18%)
20M20.00 mi1.36 mi1894+471812+461812+461440(Top 5%)1369(Top 9%)1369(Top 26%)
21M21.00 mi1.00 mi1823+711745+671745+671050(Top 4%)1001(Top 7%)1001(Top 19%)
35K21.75 mi0.75 mi1745+781671+741671+74690(Top 3%)650(Top 4%)650(Top 12%)
23M23.00 mi1.25 mi1625+1201555+1161555+116482(Top 2%)451(Top 3%)451(Top 9%)
24M24.00 mi1.00 mi1563+621494+611494+61846(Top 3%)802(Top 5%)802(Top 15%)
40K24.85 mi0.85 mi1524+391454+401454+401007(Top 4%)954(Top 6%)954(Top 18%)
25.2M25.20 mi0.35 mi1505+191436+181436+18728(Top 3%)693(Top 5%)693(Top 13%)
Finish26.22 mi1.02 mi1462+431395+411395+411035(Top 4%)984(Top 6%)984(Top 19%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 8%
×21stories
+97ft-345ft

Overall

2056

Males

1971

M18-39

1971

5K→10K

3.1 - 6.2 mi

Top 10%
×5stories
+79ft-138ft

Overall

2717

Males

2598

M18-39

2598

10K→15K

6.2 - 9.3 mi

Top 8%
×3stories
+67ft-78ft

Overall

2056

Males

1971

M18-39

1971

15K→20K

9.3 - 12.4 mi

Top 7%
×5stories
+106ft-86ft

Overall

1858

Males

1781

M18-39

1781

20K→Half

12.4 - 13.1 mi

Top 7%
×2stories
+19ft-37ft

Overall

1848

Males

1773

M18-39

1773

Half→25K

13.1 - 15.5 mi

Top 6%
×4stories
+66ft-88ft

Overall

1635

Males

1565

M18-39

1565

25K→30K

15.5 - 18.6 mi

Top 4%
×9stories
+181ft-148ft

Overall

1000

Males

951

M18-39

951

30K→20M

18.6 - 20.0 mi

Top 5%
×5stories
+64ft-50ft

Overall

1440

Males

1369

M18-39

1369

20M→21M

20.0 - 21.0 mi

Top 4%
×8stories
+106ft-24ft

Overall

1050

Males

1001

M18-39

1001

21M→35K

21.0 - 21.8 mi

Top 3%
×7stories
+17ft-86ft

Overall

690

Males

650

M18-39

650

35K→23M

21.8 - 23.0 mi

Top 2%
×5stories
+23ft-63ft

Overall

482

Males

451

M18-39

451

23M→24M

23.0 - 24.0 mi

Top 3%
×6stories
+12ft-82ft

Overall

846

Males

802

M18-39

802

24M→40K

24.0 - 24.9 mi

Top 4%
×1story
+6ft-20ft

Overall

1007

Males

954

M18-39

954

40K→25.2M

24.9 - 25.2 mi

Top 3%
×1story
+13ft-16ft

Overall

728

Males

693

M18-39

693

25.2M→Finish

25.2 - 26.2 mi

Top 4%
×2stories
+22ft-21ft

Overall

1035

Males

984

M18-39

984

Passing Analysis

Category:
Athletes Passed
2070
Passed By
81
Net Change
+1989
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3451
5K → 10K45432+422#3451#3029
10K → 15K3833+380#3029#2649
15K → 20K2382+236#2649#2413
20K → Half306+24#2413#2389
Half → 25K1474+143#2389#2246
25K → 30K3083+305#2246#1941
30K → 20M5710+47#1941#1894
20M → 21M732+71#1894#1823
21M → 35K780+78#1823#1745
35K → 23M1200+120#1745#1625
23M → 24M631+62#1625#1563
24M → 40K489+39#1563#1524
40K → 25.2M234+19#1524#1505
25.2M → Finish485+43#1505#1462
TOTALS207081+1989
📊

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