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BOSTON MARATHON 2025

Natassia Dunn

Bib: 16350•F

NY

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 46%
Gender (Female)
#0 / 12228
Top 31%
Division (F18-39)
#0 / 5469
Top 50%
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
7:34/mi
23:30
↑ 97↓ 3451.5%
10K· 6.21 mi
7:39/mi
47:17
↑ 79↓ 1380.4%
15K· 9.32 mi
7:45/mi
1:11:21
↑ 67↓ 78
20K· 12.43 mi
7:58/mi
1:36:05
↑ 106↓ 860.1%
Half· 13.11 mi
7:53/mi
1:41:28
↑ 19↓ 370.5%
25K· 15.53 mi
7:55/mi
2:00:40
↑ 66↓ 880.2%
30K· 18.64 mi
8:16/mi
2:26:20
↑ 181↓ 1480.2%
20M
8:20/mi
2:37:39
↑ 64↓ 500.2%
21M
8:55/mi
2:46:34
↑ 106↓ 241.6%
35K· 21.75 mi
8:09/mi
2:52:40
↑ 17↓ 861.7%
23M
8:28/mi
3:03:16
↑ 23↓ 630.6%
24M
8:15/mi
3:11:31
↓ 821.3%
40K· 24.85 mi
8:26/mi
3:18:44
↓ 200.3%
25.2M
8:48/mi
3:21:46
↑ 13↓ 160.2%
Finish· 26.22 mi
7:38/mi
3:29:33
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:28
Pace7:44 /mi
2nd Half
Distance13.11 mi
Time1:48:05
Pace8:15 /mi
📊Positive Split: 6.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:5723:307:3423:30
7:34
-
10K
6.21 mi11:21:4447:177:3723:47
7:39
+0:05
15K
9.32 mi11:45:481:11:217:3924:04
7:45
+0:06
20K
12.43 mi12:10:321:36:057:4424:44
7:58
+0:13
Half
13.11 mi12:15:551:41:287:445:23
7:53
-0:05
25K
15.53 mi12:35:072:00:407:4619:12
7:55
+0:02
30K
18.64 mi13:00:472:26:207:5125:40
8:16
+0:21
20M
20.00 mi13:12:062:37:397:5311:19
8:20
+0:04
21M
21.00 mi13:21:012:46:347:568:55
8:55
+0:35
35K
21.75 mi13:27:072:52:407:566:06
8:09
-0:46
23M
23.00 mi13:37:433:03:167:5810:36
8:28
+0:19
24M
24.00 mi13:45:583:11:317:598:15
8:15
-0:13
40K
24.85 mi13:53:113:18:448:007:13
8:26
+0:11
25.2M
25.20 mi13:56:133:21:468:003:02
8:48
+0:22
Finish
26.22 mi14:04:003:29:338:007:47
7:38
-1:10

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

7:34 /mi

Average Pace

8:00 /mi

Slowest Pace

8:55 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:48:28

80% of race

Time at Steady Pace

41:05

20% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:00 /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 mi10:57:5723:307:3423:30
7:34
#12812
10K
6.21 mi11:21:4447:177:3723:47
7:39
#13131
15K
9.32 mi11:45:481:11:217:3924:04
7:45
#13365
20K
12.43 mi12:10:321:36:057:4424:44
7:58
#13637
Half
13.11 mi12:15:551:41:287:445:23
7:53
#13718
25K
15.53 mi12:35:072:00:407:4619:12
7:55
#13606
30K
18.64 mi13:00:472:26:207:5125:40
8:16
#13480
20M
20.00 mi13:12:062:37:397:5311:19
8:20
#13395
21M
21.00 mi13:21:012:46:347:568:55
8:55
#13332
35K
21.75 mi13:27:072:52:407:566:06
8:09
#13329
23M
23.00 mi13:37:433:03:167:5810:36
8:28
#13286
24M
24.00 mi13:45:583:11:317:598:15
8:15
#13245
40K
24.85 mi13:53:113:18:448:007:13
8:26
#13235
25.2M
25.20 mi13:56:133:21:468:003:02
8:48
#13188
Finish
26.22 mi14:04:003:29:338:007:47
7:38
#13096
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi128123217321713917(Top 49%)3963(Top 32%)3963(Top 72%)
10K6.21 mi3.10 mi13131-3193420-2033420-20313514(Top 48%)3673(Top 30%)3673(Top 67%)
15K9.32 mi3.11 mi13365-2343613-1933613-19313917(Top 49%)3963(Top 32%)3963(Top 72%)
20K12.43 mi3.11 mi13637-2723802-1893802-18914626(Top 51%)4437(Top 36%)4437(Top 81%)
Half13.11 mi0.68 mi13718-813866-643866-6415020(Top 53%)4603(Top 38%)4603(Top 84%)
25K15.53 mi2.42 mi13606+1123822+443822+4413262(Top 47%)3805(Top 31%)3805(Top 70%)
30K18.64 mi3.11 mi13480+1263805+173805+1713247(Top 47%)3968(Top 32%)3968(Top 73%)
20M20.00 mi1.36 mi13395+853803+23803+212687(Top 45%)3797(Top 31%)3797(Top 69%)
21M21.00 mi1.00 mi13332+633792+113792+1113039(Top 46%)4139(Top 34%)4139(Top 76%)
35K21.75 mi0.75 mi13329+33815-233815-2313320(Top 47%)4319(Top 35%)4319(Top 79%)
23M23.00 mi1.25 mi13286+433834-193834-1913117(Top 46%)4326(Top 35%)4326(Top 79%)
24M24.00 mi1.00 mi13245+413834383412930(Top 46%)4280(Top 35%)4280(Top 78%)
40K24.85 mi0.85 mi13235+103860-263860-2613060(Top 46%)4471(Top 37%)4471(Top 82%)
25.2M25.20 mi0.35 mi13188+473844+163844+1610697(Top 38%)3353(Top 27%)3353(Top 61%)
Finish26.22 mi1.02 mi13096+923818+263818+2610262(Top 36%)3122(Top 26%)3122(Top 57%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 49%
×21story building
+97ft-345ft

Overall

13917

Females

3963

F18-39

3963

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13514

Females

3673

F18-39

3673

10K→15K

6.2 - 9.3 mi

Top 49%
×3story building
+67ft-78ft

Overall

13917

Females

3963

F18-39

3963

15K→20K

9.3 - 12.4 mi

Top 51%
×5story building
+106ft-86ft

Overall

14626

Females

4437

F18-39

4437

20K→Half

12.4 - 13.1 mi

Top 53%
×2story building
+19ft-37ft

Overall

15020

Females

4603

F18-39

4603

Half→25K

13.1 - 15.5 mi

Top 47%
×4story building
+66ft-88ft

Overall

13262

Females

3805

F18-39

3805

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13247

Females

3968

F18-39

3968

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12687

Females

3797

F18-39

3797

20M→21M

20.0 - 21.0 mi

Top 46%
×8story building
+106ft-24ft

Overall

13039

Females

4139

F18-39

4139

21M→35K

21.0 - 21.8 mi

Top 47%
×7story building
+17ft-86ft

Overall

13320

Females

4319

F18-39

4319

35K→23M

21.8 - 23.0 mi

Top 46%
×5story building
+23ft-63ft

Overall

13117

Females

4326

F18-39

4326

23M→24M

23.0 - 24.0 mi

Top 46%
×6story building
+12ft-82ft

Overall

12930

Females

4280

F18-39

4280

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13060

Females

4471

F18-39

4471

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10697

Females

3353

F18-39

3353

25.2M→Finish

25.2 - 26.2 mi

Top 36%
×2story building
+22ft-21ft

Overall

10262

Females

3122

F18-39

3122

Passing Analysis

Category:
Athletes Passed
1756
Passed By
2040
Net Change
-284
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12812
5K → 10K162481-319#12812#13131
10K → 15K121355-234#13131#13365
15K → 20K122394-272#13365#13637
20K → Half1596-81#13637#13718
Half → 25K222110+112#13718#13606
25K → 30K290164+126#13606#13480
30K → 20M16176+85#13480#13395
20M → 21M12966+63#13395#13332
21M → 35K7067+3#13332#13329
35K → 23M12178+43#13329#13286
23M → 24M9352+41#13286#13245
24M → 40K7969+10#13245#13235
40K → 25.2M5811+47#13235#13188
25.2M → Finish11321+92#13188#13096
TOTALS17562040-284
📊

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