Boston Marathon logo
BOSTON MARATHON 2023

Justin Givan

Bib: 7338•M

CA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 29%
Gender (Male)
#0 / 15176
Top 44%
Masters (Masters Men)
#0 / 9891
Top 31%
Division (M40-44)
#0 / 2241
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
20:47
Rank: #3597
Start → 5K
20:47 | 6:41/mi
10K· 6.21 mi
41:56
Rank: #4471 (-874)
5K → 10K
21:09 | 6:48/mi
15K· 9.32 mi
1:03:33
Rank: #5164 (-693)
10K → 15K
21:37 | 6:57/mi
20K· 12.43 mi
1:25:05
Rank: #5291 (-127)
15K → 20K
21:32 | 6:56/mi
Half· 13.11 mi
1:29:47
Rank: #5326 (-35)
20K → Half
4:42 | 6:53/mi
25K· 15.53 mi
1:46:56
Rank: #5469 (-143)
Half → 25K
17:09 | 7:04/mi
30K· 18.64 mi
2:09:36
Rank: #5544 (-75)
25K → 30K
22:40 | 7:18/mi
20M
2:19:55
Rank: #5624 (-80)
30K → 20M
10:19 | 7:36/mi
21M
2:28:29
Rank: #5825 (-201)
20M → 21M
8:34 | 8:34/mi
35K· 21.75 mi
2:34:41
Rank: #6038 (-213)
21M → 35K
6:12 | 8:17/mi
23M
2:45:53
Rank: #6486 (-448)
35K → 23M
11:12 | 8:57/mi
24M
2:55:02
Rank: #6898 (-412)
23M → 24M
9:09 | 9:09/mi
40K· 24.85 mi
3:03:44
Rank: #7478 (-580)
24M → 40K
8:42 | 10:11/mi
25.2M
3:06:49
Rank: #7559 (-81)
40K → 25.2M
3:05 | 8:56/mi
Finish· 26.22 mi
3:15:21
Rank: #7835 (-276)
25.2M → Finish
8:32 | 8:22/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
Time1:29:47
Pace6:51 /mi
2nd Half
Distance13.11 mi
Time1:45:34
Pace8:03 /mi
📊Positive Split: 17.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:25:3620:476:4120:47
6:41
-
10K
6.21 mi10:46:4541:566:4521:09
6:48
+0:07
15K
9.32 mi11:08:221:03:336:4921:37
6:57
+0:09
20K
12.43 mi11:29:541:25:056:5121:32
6:56
-0:01
Half
13.11 mi11:34:361:29:476:514:42
6:53
-0:03
25K
15.53 mi11:51:451:46:566:5317:09
7:04
+0:11
30K
18.64 mi12:14:252:09:366:5722:40
7:18
+0:14
20M
20.00 mi12:24:442:19:557:0010:19
7:36
+0:18
21M
21.00 mi12:33:182:28:297:048:34
8:34
+0:58
35K
21.75 mi12:39:302:34:417:076:12
8:17
-0:17
23M
23.00 mi12:50:422:45:537:1311:12
8:57
+0:40
24M
24.00 mi12:59:512:55:027:189:09
9:09
+0:12
40K
24.85 mi13:08:333:03:447:248:42
10:11
+1:02
25.2M
25.20 mi13:11:383:06:497:253:05
8:56
-1:15
Finish
26.22 mi13:20:103:15:217:278:32
8:22
-0:34

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

6:41 /mi

Average Pace

7:27 /mi

Slowest Pace

10:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:46:56

55% of race

Time at Steady Pace

32:59

17% of race

Time at Slower Pace

55:26

28% of race

Average Pace: 7:27 /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 mi10:25:3620:476:4120:47
6:41
#3597
10K
6.21 mi10:46:4541:566:4521:09
6:48
#4471
15K
9.32 mi11:08:221:03:336:4921:37
6:57
#5164
20K
12.43 mi11:29:541:25:056:5121:32
6:56
#5291
Half
13.11 mi11:34:361:29:476:514:42
6:53
#5326
25K
15.53 mi11:51:451:46:566:5317:09
7:04
#5469
30K
18.64 mi12:14:252:09:366:5722:40
7:18
#5544
20M
20.00 mi12:24:442:19:557:0010:19
7:36
#5624
21M
21.00 mi12:33:182:28:297:048:34
8:34
#5825
35K
21.75 mi12:39:302:34:417:076:12
8:17
#6038
23M
23.00 mi12:50:422:45:537:1311:12
8:57
#6486
24M
24.00 mi12:59:512:55:027:189:09
9:09
#6898
40K
24.85 mi13:08:333:03:447:248:42
10:11
#7478
25.2M
25.20 mi13:11:383:06:497:253:05
8:56
#7559
Finish
26.22 mi13:20:103:15:217:278:32
8:22
#7835
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi3597339033906306(Top 24%)5701(Top 38%)5701(Top 254%)
10K6.21 mi3.10 mi4471-8744182-7924182-7925384(Top 20%)4969(Top 33%)4969(Top 222%)
15K9.32 mi3.11 mi5164-6934789-6074789-6076306(Top 24%)5701(Top 38%)5701(Top 254%)
20K12.43 mi3.11 mi5291-1274898-1094898-1095559(Top 21%)5114(Top 34%)5114(Top 228%)
Half13.11 mi0.68 mi5326-354932-344932-345951(Top 22%)5460(Top 36%)5460(Top 244%)
25K15.53 mi2.42 mi5469-1435048-1165048-1165988(Top 22%)5439(Top 36%)5439(Top 243%)
30K18.64 mi3.11 mi5544-755098-505098-506002(Top 23%)5368(Top 35%)5368(Top 240%)
20M20.00 mi1.36 mi5624-805162-645162-647425(Top 28%)6230(Top 41%)6230(Top 278%)
21M21.00 mi1.00 mi5825-2015309-1475309-14710825(Top 41%)8022(Top 53%)8022(Top 358%)
35K21.75 mi0.75 mi6038-2135460-1515460-15113977(Top 53%)9396(Top 62%)9396(Top 419%)
23M23.00 mi1.25 mi6486-4485786-3265786-32615738(Top 59%)10112(Top 67%)10112(Top 451%)
24M24.00 mi1.00 mi6898-4126063-2776063-27717833(Top 67%)10987(Top 72%)10987(Top 490%)
40K24.85 mi0.85 mi7478-5806426-3636426-36320410(Top 77%)12098(Top 80%)12098(Top 540%)
25.2M25.20 mi0.35 mi7559-816474-486474-4812075(Top 45%)8269(Top 54%)8269(Top 369%)
Finish26.22 mi1.02 mi7835-2766635-1616635-16114519(Top 55%)9488(Top 63%)9488(Top 423%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 24%
×21stories
+97ft-345ft

Overall

6306

Males

5701

M40-44

5701

5K→10K

3.1 - 6.2 mi

Top 20%
×5stories
+79ft-138ft

Overall

5384

Males

4969

M40-44

4969

10K→15K

6.2 - 9.3 mi

Top 24%
×3stories
+67ft-78ft

Overall

6306

Males

5701

M40-44

5701

15K→20K

9.3 - 12.4 mi

Top 21%
×5stories
+106ft-86ft

Overall

5559

Males

5114

M40-44

5114

20K→Half

12.4 - 13.1 mi

Top 22%
×2stories
+19ft-37ft

Overall

5951

Males

5460

M40-44

5460

Half→25K

13.1 - 15.5 mi

Top 22%
×4stories
+66ft-88ft

Overall

5988

Males

5439

M40-44

5439

25K→30K

15.5 - 18.6 mi

Top 23%
×9stories
+181ft-148ft

Overall

6002

Males

5368

M40-44

5368

30K→20M

18.6 - 20.0 mi

Top 28%
×5stories
+64ft-50ft

Overall

7425

Males

6230

M40-44

6230

20M→21M

20.0 - 21.0 mi

Top 41%
×8stories
+106ft-24ft

Overall

10825

Males

8022

M40-44

8022

21M→35K

21.0 - 21.8 mi

Top 53%
×7stories
+17ft-86ft

Overall

13977

Males

9396

M40-44

9396

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

15738

Males

10112

M40-44

10112

23M→24M

23.0 - 24.0 mi

Top 67%
×6stories
+12ft-82ft

Overall

17833

Males

10987

M40-44

10987

24M→40K

24.0 - 24.9 mi

Top 77%
×1story
+6ft-20ft

Overall

20410

Males

12098

M40-44

12098

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12075

Males

8269

M40-44

8269

25.2M→Finish

25.2 - 26.2 mi

Top 55%
×2stories
+22ft-21ft

Overall

14519

Males

9488

M40-44

9488

Passing Analysis

Category:
Athletes Passed
362
Passed By
4600
Net Change
-4238
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#3597
5K → 10K20894-874#3597#4471
10K → 15K15708-693#4471#5164
15K → 20K71198-127#5164#5291
20K → Half1045-35#5291#5326
Half → 25K56199-143#5326#5469
25K → 30K94169-75#5469#5544
30K → 20M31111-80#5544#5624
20M → 21M16217-201#5624#5825
21M → 35K7220-213#5825#6038
35K → 23M12460-448#6038#6486
23M → 24M4416-412#6486#6898
24M → 40K6586-580#6898#7478
40K → 25.2M889-81#7478#7559
25.2M → Finish12288-276#7559#7835
TOTALS3624600-4238
📊

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