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BOSTON MARATHON 2025

Courtney Duckworth

MA

Bib: 15189 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 37%
Gender (Female)
#0 / 12228
Top 21%
Division (F18-39)
#0 / 5469
Top 36%
Race Day Weather
50°/40°F
broken clouds

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:35/mi
23:34
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:34/mi
47:05
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:29/mi
1:10:20
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:30/mi
1:33:37
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:21/mi
1:38:38
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:35/mi
1:57:00
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:50/mi
2:21:21
↑ 181↓ 1480.2%
138 ft elev
20M
7:56/mi
2:32:08
↑ 64↓ 500.2%
148 ft elev
21M
8:09/mi
2:40:17
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:44/mi
2:46:04
↑ 17↓ 861.7%
156 ft elev
23M
7:52/mi
2:55:55
↑ 23↓ 630.6%
116 ft elev
24M
7:44/mi
3:03:39
↓ 821.3%
34 ft elev
40K· 24.85 mi
8:00/mi
3:10:29
↓ 200.3%
20 ft elev
25.2M
8:42/mi
3:13:29
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:57/mi
3:21:35
↑ 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
1:38:387:31 /mi⚡ faster
2nd Half
1:42:577:51 /mi+4.4%
Positive split — 4.4% slower in the second half
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:1623:347:3523:34
7:35
-
10K
6.21 mi11:18:4747:057:3523:31
7:34
-0:01
15K
9.32 mi11:42:021:10:207:3323:15
7:29
-0:05
20K
12.43 mi12:05:191:33:377:3223:17
7:30
+0:01
Half
13.11 mi12:10:201:38:387:315:01
7:21
-0:09
25K
15.53 mi12:28:421:57:007:3218:22
7:35
+0:14
30K
18.64 mi12:53:032:21:217:3524:21
7:50
+0:15
20M
20.00 mi13:03:502:32:087:3610:47
7:56
+0:06
21M
21.00 mi13:11:592:40:177:388:09
8:09
+0:13
35K
21.75 mi13:17:462:46:047:385:47
7:44
-0:25
23M
23.00 mi13:27:372:55:557:399:51
7:52
+0:08
24M
24.00 mi13:35:213:03:397:397:44
7:44
-0:08
40K
24.85 mi13:42:113:10:297:406:50
8:00
+0:16
25.2M
25.20 mi13:45:113:13:297:413:00
8:42
+0:42
Finish
26.22 mi13:53:173:21:357:428:06
7:57
-0:45

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

7:21 /mi

Average Pace

7:42 /mi

Slowest Pace

8:42 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

3:10:26

94% of race

Time at Steady Pace

8:09

4% of race

Time at Slower Pace

3:00

1% 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 mi10:55:1623:347:3523:34
7:35
#12995
10K
6.21 mi11:18:4747:057:3523:31
7:34
#12820
15K
9.32 mi11:42:021:10:207:3323:15
7:29
#12399
20K
12.43 mi12:05:191:33:377:3223:17
7:30
#11932
Half
13.11 mi12:10:201:38:387:315:01
7:21
#11846
25K
15.53 mi12:28:421:57:007:3218:22
7:35
#11613
30K
18.64 mi12:53:032:21:217:3524:21
7:50
#11301
20M
20.00 mi13:03:502:32:087:3610:47
7:56
#11144
21M
21.00 mi13:11:592:40:177:388:09
8:09
#10934
35K
21.75 mi13:17:462:46:047:385:47
7:44
#10888
23M
23.00 mi13:27:372:55:557:399:51
7:52
#10730
24M
24.00 mi13:35:213:03:397:397:44
7:44
#10642
40K
24.85 mi13:42:113:10:297:406:50
8:00
#10587
25.2M
25.20 mi13:45:113:13:297:413:00
8:42
#10556
Finish
26.22 mi13:53:173:21:357:428:06
7:57
#10615
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi12995331033101163327022702
10K6.21 mi3.10 mi12820+1753242+683242+681275332253225
15K9.32 mi3.11 mi12399+4213049+1933049+1931163327022702
20K12.43 mi3.11 mi11932+4672838+2112838+2111073223352335
Half13.11 mi0.68 mi11846+862802+362802+361055122162216
25K15.53 mi2.42 mi11613+2332714+882714+881057223632363
30K18.64 mi3.11 mi11301+3122624+902624+901020923852385
20M20.00 mi1.36 mi11144+1572580+442580+441003424502450
21M21.00 mi1.00 mi10934+2102514+662514+66830118601860
35K21.75 mi0.75 mi10888+462516-22516-21033527602760
23M23.00 mi1.25 mi10730+1582476+402476+40908022972297
24M24.00 mi1.00 mi10642+882466+102466+10937125042504
40K24.85 mi0.85 mi10587+552463+32463+31016430043004
25.2M25.20 mi0.35 mi10556+312460+32460+31005330403040
Finish26.22 mi1.02 mi10615-592529-692529-691254442014201

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11633

Females

2702

F18-39

2702

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12753

Females

3225

F18-39

3225

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11633

Females

2702

F18-39

2702

15K→20K

9.3 - 12.4 mi

Top 38%
×5story building
+106ft-86ft

Overall

10732

Females

2335

F18-39

2335

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

10551

Females

2216

F18-39

2216

Half→25K

13.1 - 15.5 mi

Top 37%
×4story building
+66ft-88ft

Overall

10572

Females

2363

F18-39

2363

25K→30K

15.5 - 18.6 mi

Top 36%
×9story building
+181ft-148ft

Overall

10209

Females

2385

F18-39

2385

30K→20M

18.6 - 20.0 mi

Top 35%
×5story building
+64ft-50ft

Overall

10034

Females

2450

F18-39

2450

20M→21M

20.0 - 21.0 mi

Top 29%
×8story building
+106ft-24ft

Overall

8301

Females

1860

F18-39

1860

21M→35K

21.0 - 21.8 mi

Top 36%
×7story building
+17ft-86ft

Overall

10335

Females

2760

F18-39

2760

35K→23M

21.8 - 23.0 mi

Top 32%
×5story building
+23ft-63ft

Overall

9080

Females

2297

F18-39

2297

23M→24M

23.0 - 24.0 mi

Top 33%
×6story building
+12ft-82ft

Overall

9371

Females

2504

F18-39

2504

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

10164

Females

3004

F18-39

3004

40K→25.2M

24.9 - 25.2 mi

Top 35%
×1story
+13ft-16ft

Overall

10053

Females

3040

F18-39

3040

25.2M→Finish

25.2 - 26.2 mi

Top 44%
×2story building
+22ft-21ft

Overall

12544

Females

4201

F18-39

4201

Passing Analysis

Category:
Athletes Passed
3101
Passed By
721
Net Change
+2380
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12995
5K → 10K379204+175#12995#12820
10K → 15K46746+421#12820#12399
15K → 20K49023+467#12399#11932
20K → Half9711+86#11932#11846
Half → 25K27542+233#11846#11613
25K → 30K38977+312#11613#11301
30K → 20M19740+157#11301#11144
20M → 21M22515+210#11144#10934
21M → 35K7832+46#10934#10888
35K → 23M19032+158#10888#10730
23M → 24M11325+88#10730#10642
24M → 40K8934+55#10642#10587
40K → 25.2M5726+31#10587#10556
25.2M → Finish55114-59#10556#10615
TOTALS3101721+2380

Passing Charts

Category:
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Passing Circle

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Position Flow

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Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing