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BOSTON MARATHON 2025

Natasha Barton

Bib: 21226•F

GA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F45-49)
#0 / 1813
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
7:42/mi
23:56
↑ 97↓ 3451.5%
10K· 6.21 mi
7:41/mi
47:47
↑ 79↓ 1380.4%
15K· 9.32 mi
7:45/mi
1:11:53
↑ 67↓ 78
20K· 12.43 mi
8:01/mi
1:36:47
↑ 106↓ 860.1%
Half· 13.11 mi
8:10/mi
1:42:21
↑ 19↓ 370.5%
25K· 15.53 mi
8:45/mi
2:03:34
↑ 66↓ 880.2%
30K· 18.64 mi
10:04/mi
2:34:50
↑ 181↓ 1480.2%
20M
10:53/mi
2:49:38
↑ 64↓ 500.2%
21M
11:48/mi
3:01:26
↑ 106↓ 241.6%
35K· 21.75 mi
10:15/mi
3:09:06
↑ 17↓ 861.7%
23M
11:11/mi
3:23:06
↑ 23↓ 630.6%
24M
10:43/mi
3:33:49
↓ 821.3%
40K· 24.85 mi
12:17/mi
3:44:19
↓ 200.3%
25.2M
13:09/mi
3:48:51
↑ 13↓ 160.2%
Finish· 26.22 mi
10:04/mi
3:59:07
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:21
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time2:16:46
Pace10:26 /mi
📊Positive Split: 33.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0823:567:4223:56
7:42
-
10K
6.21 mi11:41:5947:477:4123:51
7:41
-0:01
15K
9.32 mi12:06:051:11:537:4324:06
7:45
+0:04
20K
12.43 mi12:30:591:36:477:4724:54
8:01
+0:16
Half
13.11 mi12:36:331:42:217:485:34
8:10
+0:09
25K
15.53 mi12:57:462:03:347:5721:13
8:45
+0:35
30K
18.64 mi13:29:022:34:508:1831:16
10:04
+1:19
20M
20.00 mi13:43:502:49:388:2914:48
10:53
+0:49
21M
21.00 mi13:55:383:01:268:3811:48
11:48
+0:55
35K
21.75 mi14:03:183:09:068:427:40
10:15
-1:33
23M
23.00 mi14:17:183:23:068:5014:00
11:11
+0:56
24M
24.00 mi14:28:013:33:498:5510:43
10:43
-0:28
40K
24.85 mi14:38:313:44:199:0210:30
12:17
+1:34
25.2M
25.20 mi14:43:033:48:519:054:32
13:09
+0:52
Finish
26.22 mi14:53:193:59:079:0810:16
10:04
-3:05

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

7:41 /mi

Average Pace

9:08 /mi

Slowest Pace

13:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:03:34

52% of race

Time at Steady Pace

1:14:43

31% of race

Time at Slower Pace

40:50

17% of race

Average Pace: 9:07 /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 mi11:18:0823:567:4223:56
7:42
#14027
10K
6.21 mi11:41:5947:477:4123:51
7:41
#13853
15K
9.32 mi12:06:051:11:537:4324:06
7:45
#13862
20K
12.43 mi12:30:591:36:477:4724:54
8:01
#14160
Half
13.11 mi12:36:331:42:217:485:34
8:10
#14302
25K
15.53 mi12:57:462:03:347:5721:13
8:45
#15200
30K
18.64 mi13:29:022:34:508:1831:16
10:04
#16870
20M
20.00 mi13:43:502:49:388:2914:48
10:53
#17651
21M
21.00 mi13:55:383:01:268:3811:48
11:48
#18253
35K
21.75 mi14:03:183:09:068:427:40
10:15
#18517
23M
23.00 mi14:17:183:23:068:5014:00
11:11
#19052
24M
24.00 mi14:28:013:33:498:5510:43
10:43
#19342
40K
24.85 mi14:38:313:44:199:0210:30
12:17
#19799
25.2M
25.20 mi14:43:033:48:519:054:32
13:09
#19959
Finish
26.22 mi14:53:193:59:079:0810:16
10:04
#20181
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi140273930393014015(Top 49%)4027(Top 33%)4027(Top 222%)
10K6.21 mi3.10 mi13853+1743859+713859+7113697(Top 48%)3780(Top 31%)3780(Top 208%)
15K9.32 mi3.11 mi13862-93887-283887-2814015(Top 49%)4027(Top 33%)4027(Top 222%)
20K12.43 mi3.11 mi14160-2984099-2124099-21215063(Top 53%)4678(Top 38%)4678(Top 258%)
Half13.11 mi0.68 mi14302-1424181-824181-8217106(Top 60%)5844(Top 48%)5844(Top 322%)
25K15.53 mi2.42 mi15200-8984723-5424723-54218687(Top 66%)6810(Top 56%)6810(Top 376%)
30K18.64 mi3.11 mi16870-16705738-10155738-101521776(Top 77%)8656(Top 71%)8656(Top 477%)
20M20.00 mi1.36 mi17651-7816237-4996237-49923371(Top 82%)9606(Top 79%)9606(Top 530%)
21M21.00 mi1.00 mi18253-6026582-3456582-34523215(Top 82%)9608(Top 79%)9608(Top 530%)
35K21.75 mi0.75 mi18517-2646746-1646746-16422559(Top 79%)9307(Top 76%)9307(Top 513%)
23M23.00 mi1.25 mi19052-5357076-3307076-33023638(Top 83%)9917(Top 81%)9917(Top 547%)
24M24.00 mi1.00 mi19342-2907275-1997275-19923363(Top 82%)9807(Top 80%)9807(Top 541%)
40K24.85 mi0.85 mi19799-4577555-2807555-28025359(Top 89%)10846(Top 89%)10846(Top 598%)
25.2M25.20 mi0.35 mi19959-1607645-907645-9025246(Top 89%)10811(Top 88%)10811(Top 596%)
Finish26.22 mi1.02 mi20181-2227770-1257770-12523152(Top 82%)9739(Top 80%)9739(Top 537%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

14015

Females

4027

F45-49

4027

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13697

Females

3780

F45-49

3780

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

14015

Females

4027

F45-49

4027

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

15063

Females

4678

F45-49

4678

20K→Half

12.4 - 13.1 mi

Top 60%
×2story building
+19ft-37ft

Overall

17106

Females

5844

F45-49

5844

Half→25K

13.1 - 15.5 mi

Top 66%
×4story building
+66ft-88ft

Overall

18687

Females

6810

F45-49

6810

25K→30K

15.5 - 18.6 mi

Top 77%
×9story building
+181ft-148ft

Overall

21776

Females

8656

F45-49

8656

30K→20M

18.6 - 20.0 mi

Top 82%
×5story building
+64ft-50ft

Overall

23371

Females

9606

F45-49

9606

20M→21M

20.0 - 21.0 mi

Top 82%
×8story building
+106ft-24ft

Overall

23215

Females

9608

F45-49

9608

21M→35K

21.0 - 21.8 mi

Top 79%
×7story building
+17ft-86ft

Overall

22559

Females

9307

F45-49

9307

35K→23M

21.8 - 23.0 mi

Top 83%
×5story building
+23ft-63ft

Overall

23638

Females

9917

F45-49

9917

23M→24M

23.0 - 24.0 mi

Top 82%
×6story building
+12ft-82ft

Overall

23363

Females

9807

F45-49

9807

24M→40K

24.0 - 24.9 mi

Top 89%
×1story
+6ft-20ft

Overall

25359

Females

10846

F45-49

10846

40K→25.2M

24.9 - 25.2 mi

Top 89%
×1story
+13ft-16ft

Overall

25246

Females

10811

F45-49

10811

25.2M→Finish

25.2 - 26.2 mi

Top 82%
×2story building
+22ft-21ft

Overall

23152

Females

9739

F45-49

9739

Passing Analysis

Category:
Athletes Passed
861
Passed By
7015
Net Change
-6154
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14027
5K → 10K361187+174#14027#13853
10K → 15K189198-9#13853#13862
15K → 20K134432-298#13862#14160
20K → Half3145-142#14160#14302
Half → 25K37935-898#14302#15200
25K → 30K211691-1670#15200#16870
30K → 20M20801-781#16870#17651
20M → 21M14616-602#17651#18253
21M → 35K11275-264#18253#18517
35K → 23M22557-535#18517#19052
23M → 24M22312-290#19052#19342
24M → 40K9466-457#19342#19799
40K → 25.2M4164-160#19799#19959
25.2M → Finish14236-222#19959#20181
TOTALS8617015-6154
📊

Passing Visuals

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