Boston Marathon logo
BOSTON MARATHON 2023

Anna Duffy

PA

Bib: 15179 F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 36%
Gender (Female)
#0 / 11423
Top 16%
Division (F18-39)
#0 / 4884
Top 30%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:42/mi
23:55
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:42/mi
47:51
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:46/mi
1:12:00
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:37/mi
1:35:41
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:26/mi
1:40:45
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:35/mi
1:59:07
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:38/mi
2:22:49
↑ 181↓ 1480.2%
138 ft elev
20M
7:35/mi
2:33:07
↑ 64↓ 500.2%
148 ft elev
21M
8:00/mi
2:41:07
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:25/mi
2:46:40
↑ 17↓ 861.7%
156 ft elev
23M
7:45/mi
2:56:22
↑ 23↓ 630.6%
116 ft elev
24M
7:32/mi
3:03:54
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:50/mi
3:10:36
↓ 200.3%
20 ft elev
25.2M
8:25/mi
3:13:30
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:38/mi
3:21:17
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:40:457:41 /mi⚖️ balanced
2nd Half
1:40:327:40 /mi⚖️ balanced
Even split — consistent pacing between halves
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:4323:557:4223:55
7:42
-
10K
6.21 mi11:18:3947:517:4223:56
7:42
0:00
15K
9.32 mi11:42:481:12:007:4324:09
7:46
+0:04
20K
12.43 mi12:06:291:35:417:4223:41
7:37
-0:09
Half
13.11 mi12:11:331:40:457:415:04
7:26
-0:11
25K
15.53 mi12:29:551:59:077:4018:22
7:35
+0:09
30K
18.64 mi12:53:372:22:497:4023:42
7:38
+0:03
20M
20.00 mi13:03:552:33:077:3910:18
7:35
-0:03
21M
21.00 mi13:11:552:41:077:408:00
8:00
+0:25
35K
21.75 mi13:17:282:46:407:405:33
7:25
-0:35
23M
23.00 mi13:27:102:56:227:409:42
7:45
+0:20
24M
24.00 mi13:34:423:03:547:407:32
7:32
-0:13
40K
24.85 mi13:41:243:10:367:406:42
7:50
+0:18
25.2M
25.20 mi13:44:183:13:307:412:54
8:25
+0:35
Finish
26.22 mi13:52:053:21:177:417:47
7:38
-0:47

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

7:25 /mi

Average Pace

7:41 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

3:18:23

99% of race

Time at Steady Pace

2:54

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:41 /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 mi10:54:4323:557:4223:55
7:42
#11430
10K
6.21 mi11:18:3947:517:4223:56
7:42
#11820
15K
9.32 mi11:42:481:12:007:4324:09
7:46
#12007
20K
12.43 mi12:06:291:35:417:4223:41
7:37
#11531
Half
13.11 mi12:11:331:40:457:415:04
7:26
#11413
25K
15.53 mi12:29:551:59:077:4018:22
7:35
#11041
30K
18.64 mi12:53:372:22:497:4023:42
7:38
#10448
20M
20.00 mi13:03:552:33:077:3910:18
7:35
#10209
21M
21.00 mi13:11:552:41:077:408:00
8:00
#9997
35K
21.75 mi13:17:282:46:407:405:33
7:25
#9910
23M
23.00 mi13:27:102:56:227:409:42
7:45
#9759
24M
24.00 mi13:34:423:03:547:407:32
7:32
#9634
40K
24.85 mi13:41:243:10:367:406:42
7:50
#9573
25.2M
25.20 mi13:44:183:13:307:412:54
8:25
#9545
Finish
26.22 mi13:52:053:21:177:417:47
7:38
#9526
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi11430255225521248931723172
10K6.21 mi3.10 mi11820-3902773-2212773-2211226830163016
15K9.32 mi3.11 mi12007-1872895-1222895-1221248931723172
20K12.43 mi3.11 mi11531+4762640+2552640+2551027220332033
Half13.11 mi0.68 mi11413+1182572+682572+68968017511751
25K15.53 mi2.42 mi11041+3722376+1962376+196936517141714
30K18.64 mi3.11 mi10448+5932123+2532123+253816413751375
20M20.00 mi1.36 mi10209+2392028+952028+95739111841184
21M21.00 mi1.00 mi9997+2121950+781950+78738312791279
35K21.75 mi0.75 mi9910+871921+291921+29799515021502
23M23.00 mi1.25 mi9759+1511892+291892+29808516291629
24M24.00 mi1.00 mi9634+1251857+351857+35796516651665
40K24.85 mi0.85 mi9573+6118571857892721432143
25.2M25.20 mi0.35 mi9545+281858-11858-1901722432243
Finish26.22 mi1.02 mi9526+191876-181876-18956424942494

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

12489

Females

3172

F18-39

3172

5K→10K

3.1 - 6.2 mi

Top 46%
×5story building
+79ft-138ft

Overall

12268

Females

3016

F18-39

3016

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

12489

Females

3172

F18-39

3172

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

10272

Females

2033

F18-39

2033

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

9680

Females

1751

F18-39

1751

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9365

Females

1714

F18-39

1714

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8164

Females

1375

F18-39

1375

30K→20M

18.6 - 20.0 mi

Top 28%
×5story building
+64ft-50ft

Overall

7391

Females

1184

F18-39

1184

20M→21M

20.0 - 21.0 mi

Top 28%
×8story building
+106ft-24ft

Overall

7383

Females

1279

F18-39

1279

21M→35K

21.0 - 21.8 mi

Top 30%
×7story building
+17ft-86ft

Overall

7995

Females

1502

F18-39

1502

35K→23M

21.8 - 23.0 mi

Top 30%
×5story building
+23ft-63ft

Overall

8085

Females

1629

F18-39

1629

23M→24M

23.0 - 24.0 mi

Top 30%
×6story building
+12ft-82ft

Overall

7965

Females

1665

F18-39

1665

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

8927

Females

2143

F18-39

2143

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9017

Females

2243

F18-39

2243

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

9564

Females

2494

F18-39

2494

Passing Analysis

Category:
Athletes Passed
2949*
Passed By
1045
Net Change
+1904
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11430
5K → 10K160550-390#11430#11820
10K → 15K128315-187#11820#12007
15K → 20K49317+476#12007#11531
20K → Half1202+118#11531#11413
Half → 25K3742+372#11413#11041
25K → 30K5985+593#11041#10448
30K → 20M243*4+239#10448#10209
20M → 21M219*7+212#10209#9997
21M → 35K936+87#9997#9910
35K → 23M17322+151#9910#9759
23M → 24M13712+125#9759#9634
24M → 40K85*24+61#9634#9573
40K → 25.2M4820+28#9573#9545
25.2M → Finish7859+19#9545#9526
TOTALS2949*1045+1904

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

Passing Charts

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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing