Boston Marathon logo
BOSTON MARATHON 2023

Naomi Macdonald

Bib: 19096•F

BC

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Top 40%
Gender (Female)
#0 / 11423
Top 21%
Masters (Masters Women)
#0 / 6539
Top 9%
Division (F45-49)
#0 / 1817
Top 9%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:18
Rank: #9650
Start → 5K
7:30/mi
23:18 split
10K· 6.21 mi
46:13
Rank: #9489 (+161)
5K → 10K
7:23/mi
22:55 split
15K· 9.32 mi
1:09:26
Rank: #9612 (-123)
10K → 15K
7:28/mi
23:13 split
20K· 12.43 mi
1:33:09
Rank: #9789 (-177)
15K → 20K
7:38/mi
23:43 split
Half· 13.11 mi
1:38:15
Rank: #9807 (-18)
20K → Half
7:29/mi
5:06 split
25K· 15.53 mi
1:56:58
Rank: #9891 (-84)
Half → 25K
7:43/mi
18:43 split
30K· 18.64 mi
2:21:17
Rank: #9816 (+75)
25K → 30K
7:50/mi
24:19 split
20M
2:32:12
Rank: #9820 (-4)
30K → 20M
8:02/mi
10:55 split
21M
2:40:49
Rank: #9879 (-59)
20M → 21M
8:37/mi
8:37 split
35K· 21.75 mi
2:46:50
Rank: #9954 (-75)
21M → 35K
8:03/mi
6:01 split
23M
2:57:19
Rank: #10092 (-138)
35K → 23M
8:22/mi
10:29 split
24M
3:05:35
Rank: #10201 (-109)
23M → 24M
8:16/mi
8:16 split
40K· 24.85 mi
3:13:00
Rank: #10358 (-157)
24M → 40K
8:40/mi
7:25 split
25.2M
3:16:19
Rank: #10453 (-95)
40K → 25.2M
9:37/mi
3:19 split
Finish· 26.22 mi
3:24:54
Rank: #10619 (-166)
25.2M → Finish
8:25/mi
8:35 split

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
Time1:38:15
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:46:39
Pace8:08 /mi
📊Positive Split: 8.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:15:0523:187:3023:18
7:30
-
10K
6.21 mi11:38:0046:137:2622:55
7:23
-0:07
15K
9.32 mi12:01:131:09:267:2723:13
7:28
+0:05
20K
12.43 mi12:24:561:33:097:3023:43
7:38
+0:10
Half
13.11 mi12:30:021:38:157:305:06
7:29
-0:09
25K
15.53 mi12:48:451:56:587:3218:43
7:43
+0:14
30K
18.64 mi13:13:042:21:177:3524:19
7:50
+0:07
20M
20.00 mi13:23:592:32:127:3710:55
8:02
+0:12
21M
21.00 mi13:32:362:40:497:398:37
8:37
+0:35
35K
21.75 mi13:38:372:46:507:406:01
8:03
-0:34
23M
23.00 mi13:49:062:57:197:4310:29
8:22
+0:19
24M
24.00 mi13:57:223:05:357:448:16
8:16
-0:06
40K
24.85 mi14:04:473:13:007:467:25
8:40
+0:24
25.2M
25.20 mi14:08:063:16:197:473:19
9:37
+0:57
Finish
26.22 mi14:16:413:24:547:498:35
8:25
-1:12

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

7:23 /mi

Average Pace

7:49 /mi

Slowest Pace

9:37 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:58

57% of race

Time at Steady Pace

49:31

24% of race

Time at Slower Pace

38:25

19% of race

Average Pace: 7:49 /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 mi11:15:0523:187:3023:18
7:30
#9650
10K
6.21 mi11:38:0046:137:2622:55
7:23
#9489
15K
9.32 mi12:01:131:09:267:2723:13
7:28
#9612
20K
12.43 mi12:24:561:33:097:3023:43
7:38
#9789
Half
13.11 mi12:30:021:38:157:305:06
7:29
#9807
25K
15.53 mi12:48:451:56:587:3218:43
7:43
#9891
30K
18.64 mi13:13:042:21:177:3524:19
7:50
#9816
20M
20.00 mi13:23:592:32:127:3710:55
8:02
#9820
21M
21.00 mi13:32:362:40:497:398:37
8:37
#9879
35K
21.75 mi13:38:372:46:507:406:01
8:03
#9954
23M
23.00 mi13:49:062:57:197:4310:29
8:22
#10092
24M
24.00 mi13:57:223:05:357:448:16
8:16
#10201
40K
24.85 mi14:04:473:13:007:467:25
8:40
#10358
25.2M
25.20 mi14:08:063:16:197:473:19
9:37
#10453
Finish
26.22 mi14:16:413:24:547:498:35
8:25
#10619
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi9650168416849970(Top 37%)1830(Top 16%)1830(Top 101%)
10K6.21 mi3.10 mi9489+1611607+771607+779439(Top 35%)1605(Top 14%)1605(Top 88%)
15K9.32 mi3.11 mi9612-1231667-601667-609970(Top 37%)1830(Top 16%)1830(Top 101%)
20K12.43 mi3.11 mi9789-1771749-821749-8210377(Top 39%)2086(Top 18%)2086(Top 115%)
Half13.11 mi0.68 mi9807-181756-71756-710110(Top 38%)1946(Top 17%)1946(Top 107%)
25K15.53 mi2.42 mi9891-841808-521808-5210463(Top 39%)2210(Top 19%)2210(Top 122%)
30K18.64 mi3.11 mi9816+75180818089586(Top 36%)1964(Top 17%)1964(Top 108%)
20M20.00 mi1.36 mi9820-41838-301838-3010535(Top 40%)2502(Top 22%)2502(Top 138%)
21M21.00 mi1.00 mi9879-591892-541892-5411164(Top 42%)2946(Top 26%)2946(Top 162%)
35K21.75 mi0.75 mi9954-751947-551947-5512435(Top 47%)3654(Top 32%)3654(Top 201%)
23M23.00 mi1.25 mi10092-1382044-972044-9712404(Top 47%)3734(Top 33%)3734(Top 206%)
24M24.00 mi1.00 mi10201-1092124-802124-8013065(Top 49%)4154(Top 36%)4154(Top 229%)
40K24.85 mi0.85 mi10358-1572232-1082232-10814369(Top 54%)4941(Top 43%)4941(Top 272%)
25.2M25.20 mi0.35 mi10453-952298-662298-6615740(Top 59%)5696(Top 50%)5696(Top 313%)
Finish26.22 mi1.02 mi10619-1662397-992397-9914891(Top 56%)5192(Top 45%)5192(Top 286%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 37%
×21story building
+97ft-345ft

Overall

9970

Females

1830

F45-49

1830

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

9439

Females

1605

F45-49

1605

10K→15K

6.2 - 9.3 mi

Top 37%
×3story building
+67ft-78ft

Overall

9970

Females

1830

F45-49

1830

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10377

Females

2086

F45-49

2086

20K→Half

12.4 - 13.1 mi

Top 38%
×2story building
+19ft-37ft

Overall

10110

Females

1946

F45-49

1946

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10463

Females

2210

F45-49

2210

25K→30K

15.5 - 18.6 mi

Top 36%
×9story building
+181ft-148ft

Overall

9586

Females

1964

F45-49

1964

30K→20M

18.6 - 20.0 mi

Top 40%
×5story building
+64ft-50ft

Overall

10535

Females

2502

F45-49

2502

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11164

Females

2946

F45-49

2946

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

12435

Females

3654

F45-49

3654

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

12404

Females

3734

F45-49

3734

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13065

Females

4154

F45-49

4154

24M→40K

24.0 - 24.9 mi

Top 54%
×1story
+6ft-20ft

Overall

14369

Females

4941

F45-49

4941

40K→25.2M

24.9 - 25.2 mi

Top 59%
×1story
+13ft-16ft

Overall

15740

Females

5696

F45-49

5696

25.2M→Finish

25.2 - 26.2 mi

Top 56%
×2story building
+22ft-21ft

Overall

14891

Females

5192

F45-49

5192

Passing Analysis

Category:
Athletes Passed
1246*
Passed By
2210
Net Change
-969
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9650
5K → 10K378217+161#9650#9489
10K → 15K121244-123#9489#9612
15K → 20K97274-177#9612#9789
20K → Half2341-18#9789#9807
Half → 25K89172-84#9807#9891
25K → 30K194*119+75#9891#9816
30K → 20M8488-4#9816#9820
20M → 21M70128-59#9820#9879
21M → 35K2196-75#9879#9954
35K → 23M41177-138#9954#10092
23M → 24M45153-109#10092#10201
24M → 40K34191-157#10201#10358
40K → 25.2M11106-95#10358#10453
25.2M → Finish38204-166#10453#10619
TOTALS1246*2210-969

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Visuals

Category:
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