Boston Marathon logo
BOSTON MARATHON 2025

Amina Chamberlain

Bib: 19758•F

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 44%
Masters (Masters Women)
#0 / 6759
Top 31%
Division (F40-44)
#0 / 1718
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:40/mi
23:50
↑ 97↓ 3451.5%
10K· 6.21 mi
7:46/mi
47:59
↑ 79↓ 1380.4%
15K· 9.32 mi
7:57/mi
1:12:40
↑ 67↓ 78
20K· 12.43 mi
8:11/mi
1:38:06
↑ 106↓ 860.1%
Half· 13.11 mi
8:14/mi
1:43:43
↑ 19↓ 370.5%
25K· 15.53 mi
8:22/mi
2:04:00
↑ 66↓ 880.2%
30K· 18.64 mi
8:49/mi
2:31:22
↑ 181↓ 1480.2%
20M
9:07/mi
2:43:45
↑ 64↓ 500.2%
21M
9:53/mi
2:53:38
↑ 106↓ 241.6%
35K· 21.75 mi
8:40/mi
3:00:07
↑ 17↓ 861.7%
23M
9:09/mi
3:11:35
↑ 23↓ 630.6%
24M
8:53/mi
3:20:28
↓ 821.3%
40K· 24.85 mi
8:59/mi
3:28:09
↓ 200.3%
25.2M
9:37/mi
3:31:28
↑ 13↓ 160.2%
Finish· 26.22 mi
8:40/mi
3:40:18
↑ 22↓ 21

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
Time1:43:43
Pace7:55 /mi
2nd Half
Distance13.11 mi
Time1:56:35
Pace8:54 /mi
📊Positive Split: 12.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3823:507:4023:50
7:40
-
10K
6.21 mi11:41:4747:597:4324:09
7:46
+0:06
15K
9.32 mi12:06:281:12:407:4824:41
7:57
+0:11
20K
12.43 mi12:31:541:38:067:5425:26
8:11
+0:14
Half
13.11 mi12:37:311:43:437:555:37
8:14
+0:03
25K
15.53 mi12:57:482:04:007:5920:17
8:22
+0:08
30K
18.64 mi13:25:102:31:228:0727:22
8:49
+0:27
20M
20.00 mi13:37:332:43:458:1112:23
9:07
+0:18
21M
21.00 mi13:47:262:53:388:169:53
9:53
+0:46
35K
21.75 mi13:53:553:00:078:176:29
8:40
-1:13
23M
23.00 mi14:05:233:11:358:2011:28
9:09
+0:29
24M
24.00 mi14:14:163:20:288:218:53
8:53
-0:16
40K
24.85 mi14:21:573:28:098:227:41
8:59
+0:06
25.2M
25.20 mi14:25:163:31:288:233:19
9:37
+0:38
Finish
26.22 mi14:34:063:40:188:258:50
8:40
-0:57

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

7:40 /mi

Average Pace

8:25 /mi

Slowest Pace

9:53 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:43:43

47% of race

Time at Steady Pace

1:11:51

33% of race

Time at Slower Pace

44:44

20% of race

Average Pace: 8:24 /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 mi11:17:3823:507:4023:50
7:40
#13735
10K
6.21 mi11:41:4747:597:4324:09
7:46
#14097
15K
9.32 mi12:06:281:12:407:4824:41
7:57
#14603
20K
12.43 mi12:31:541:38:067:5425:26
8:11
#15051
Half
13.11 mi12:37:311:43:437:555:37
8:14
#15198
25K
15.53 mi12:57:482:04:007:5920:17
8:22
#15409
30K
18.64 mi13:25:102:31:228:0727:22
8:49
#15662
20M
20.00 mi13:37:332:43:458:1112:23
9:07
#15765
21M
21.00 mi13:47:262:53:388:169:53
9:53
#15866
35K
21.75 mi13:53:553:00:078:176:29
8:40
#15844
23M
23.00 mi14:05:233:11:358:2011:28
9:09
#15888
24M
24.00 mi14:14:163:20:288:218:53
8:53
#15921
40K
24.85 mi14:21:573:28:098:227:41
8:59
#15909
25.2M
25.20 mi14:25:163:31:288:233:19
9:37
#15888
Finish
26.22 mi14:34:063:40:188:258:50
8:40
#15945
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi137353735373515636(Top 55%)4929(Top 40%)4929(Top 287%)
10K6.21 mi3.10 mi14097-3623998-2633998-26314587(Top 51%)4311(Top 35%)4311(Top 251%)
15K9.32 mi3.11 mi14603-5064317-3194317-31915636(Top 55%)4929(Top 40%)4929(Top 287%)
20K12.43 mi3.11 mi15051-4484612-2954612-29516237(Top 57%)5348(Top 44%)5348(Top 311%)
Half13.11 mi0.68 mi15198-1474697-854697-8517502(Top 62%)6028(Top 49%)6028(Top 351%)
25K15.53 mi2.42 mi15409-2114838-1414838-14116336(Top 58%)5500(Top 45%)5500(Top 320%)
30K18.64 mi3.11 mi15662-2535031-1935031-19316656(Top 59%)5832(Top 48%)5832(Top 339%)
20M20.00 mi1.36 mi15765-1035134-1035134-10317377(Top 61%)6350(Top 52%)6350(Top 370%)
21M21.00 mi1.00 mi15866-1015230-965230-9617849(Top 63%)6709(Top 55%)6709(Top 391%)
35K21.75 mi0.75 mi15844+225233-35233-316496(Top 58%)6055(Top 50%)6055(Top 352%)
23M23.00 mi1.25 mi15888-445303-705303-7017148(Top 60%)6526(Top 53%)6526(Top 380%)
24M24.00 mi1.00 mi15921-335334-315334-3116765(Top 59%)6355(Top 52%)6355(Top 370%)
40K24.85 mi0.85 mi15909+125351-175351-1716236(Top 57%)6168(Top 50%)6168(Top 359%)
25.2M25.20 mi0.35 mi15888+215356-55356-515224(Top 54%)5665(Top 46%)5665(Top 330%)
Finish26.22 mi1.02 mi15945-575400-445400-4417291(Top 61%)6694(Top 55%)6694(Top 390%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21story building
+97ft-345ft

Overall

15636

Females

4929

F40-44

4929

5K→10K

3.1 - 6.2 mi

Top 51%
×5story building
+79ft-138ft

Overall

14587

Females

4311

F40-44

4311

10K→15K

6.2 - 9.3 mi

Top 55%
×3story building
+67ft-78ft

Overall

15636

Females

4929

F40-44

4929

15K→20K

9.3 - 12.4 mi

Top 57%
×5story building
+106ft-86ft

Overall

16237

Females

5348

F40-44

5348

20K→Half

12.4 - 13.1 mi

Top 62%
×2story building
+19ft-37ft

Overall

17502

Females

6028

F40-44

6028

Half→25K

13.1 - 15.5 mi

Top 58%
×4story building
+66ft-88ft

Overall

16336

Females

5500

F40-44

5500

25K→30K

15.5 - 18.6 mi

Top 59%
×9story building
+181ft-148ft

Overall

16656

Females

5832

F40-44

5832

30K→20M

18.6 - 20.0 mi

Top 61%
×5story building
+64ft-50ft

Overall

17377

Females

6350

F40-44

6350

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

17849

Females

6709

F40-44

6709

21M→35K

21.0 - 21.8 mi

Top 58%
×7story building
+17ft-86ft

Overall

16496

Females

6055

F40-44

6055

35K→23M

21.8 - 23.0 mi

Top 60%
×5story building
+23ft-63ft

Overall

17148

Females

6526

F40-44

6526

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

16765

Females

6355

F40-44

6355

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

16236

Females

6168

F40-44

6168

40K→25.2M

24.9 - 25.2 mi

Top 54%
×1story
+13ft-16ft

Overall

15224

Females

5665

F40-44

5665

25.2M→Finish

25.2 - 26.2 mi

Top 61%
×2story building
+22ft-21ft

Overall

17291

Females

6694

F40-44

6694

Passing Analysis

Category:
Athletes Passed
1218
Passed By
3428
Net Change
-2210
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13735
5K → 10K158520-362#13735#14097
10K → 15K84590-506#14097#14603
15K → 20K116564-448#14603#15051
20K → Half10157-147#15051#15198
Half → 25K110321-211#15198#15409
25K → 30K167420-253#15409#15662
30K → 20M94197-103#15662#15765
20M → 21M82183-101#15765#15866
21M → 35K7553+22#15866#15844
35K → 23M103147-44#15844#15888
23M → 24M5790-33#15888#15921
24M → 40K7159+12#15921#15909
40K → 25.2M4524+21#15909#15888
25.2M → Finish46103-57#15888#15945
TOTALS12183428-2210
📊

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

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing