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BOSTON MARATHON 2025

Natalie Smith

Bib: 19391•F

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
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
8:23/mi
26:03
↑ 97↓ 3451.5%
10K· 6.21 mi
8:36/mi
52:46
↑ 79↓ 1380.4%
15K· 9.32 mi
8:39/mi
1:19:37
↑ 67↓ 78
20K· 12.43 mi
8:49/mi
1:47:00
↑ 106↓ 860.1%
Half· 13.11 mi
8:45/mi
1:52:58
↑ 19↓ 370.5%
25K· 15.53 mi
9:00/mi
2:14:47
↑ 66↓ 880.2%
30K· 18.64 mi
9:17/mi
2:43:36
↑ 181↓ 1480.2%
20M
9:09/mi
2:56:02
↑ 64↓ 500.2%
21M
9:52/mi
3:05:54
↑ 106↓ 241.6%
35K· 21.75 mi
8:19/mi
3:12:07
↑ 17↓ 861.7%
23M
9:01/mi
3:23:24
↑ 23↓ 630.6%
24M
8:53/mi
3:32:17
↓ 821.3%
40K· 24.85 mi
8:46/mi
3:39:47
↓ 200.3%
25.2M
9:02/mi
3:42:54
↑ 13↓ 160.2%
Finish· 26.22 mi
8:06/mi
3:51:09
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:52:58
Pace8:37 /mi
2nd Half
Distance13.11 mi
Time1:58:11
Pace9:01 /mi
📊Positive Split: 4.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:2026:038:2326:03
8:23
-
10K
6.21 mi11:45:0352:468:3026:43
8:36
+0:13
15K
9.32 mi12:11:541:19:378:3326:51
8:39
+0:03
20K
12.43 mi12:39:171:47:008:3727:23
8:49
+0:10
Half
13.11 mi12:45:151:52:588:375:58
8:45
-0:04
25K
15.53 mi13:07:042:14:478:4121:49
9:00
+0:15
30K
18.64 mi13:35:532:43:368:4728:49
9:17
+0:17
20M
20.00 mi13:48:192:56:028:4812:26
9:09
-0:08
21M
21.00 mi13:58:113:05:548:519:52
9:52
+0:43
35K
21.75 mi14:04:243:12:078:506:13
8:19
-1:33
23M
23.00 mi14:15:413:23:248:5111:17
9:01
+0:42
24M
24.00 mi14:24:343:32:178:518:53
8:53
-0:08
40K
24.85 mi14:32:043:39:478:517:30
8:46
-0:07
25.2M
25.20 mi14:35:113:42:548:513:07
9:02
+0:16
Finish
26.22 mi14:43:263:51:098:498:15
8:06
-0:56

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

8:06 /mi

Average Pace

8:49 /mi

Slowest Pace

9:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:07:14

29% of race

Time at Steady Pace

1:49:41

47% of race

Time at Slower Pace

54:14

23% of race

Average Pace: 8:49 /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 mi11:18:2026:038:2326:03
8:23
#19217
10K
6.21 mi11:45:0352:468:3026:43
8:36
#19792
15K
9.32 mi12:11:541:19:378:3326:51
8:39
#19934
20K
12.43 mi12:39:171:47:008:3727:23
8:49
#19922
Half
13.11 mi12:45:151:52:588:375:58
8:45
#19957
25K
15.53 mi13:07:042:14:478:4121:49
9:00
#19925
30K
18.64 mi13:35:532:43:368:4728:49
9:17
#19733
20M
20.00 mi13:48:192:56:028:4812:26
9:09
#19573
21M
21.00 mi13:58:113:05:548:519:52
9:52
#19445
35K
21.75 mi14:04:243:12:078:506:13
8:19
#19285
23M
23.00 mi14:15:413:23:248:5111:17
9:01
#19124
24M
24.00 mi14:24:343:32:178:518:53
8:53
#19019
40K
24.85 mi14:32:043:39:478:517:30
8:46
#18855
25.2M
25.20 mi14:35:113:42:548:513:07
9:02
#18755
Finish
26.22 mi14:43:263:51:098:498:15
8:06
#18576
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi192177030703020172(Top 71%)7526(Top 62%)7526(Top 138%)
10K6.21 mi3.10 mi19792-5757350-3207350-32020356(Top 72%)7668(Top 63%)7668(Top 140%)
15K9.32 mi3.11 mi19934-1427432-827432-8220172(Top 71%)7526(Top 62%)7526(Top 138%)
20K12.43 mi3.11 mi19922+127428+47428+420008(Top 70%)7482(Top 61%)7482(Top 137%)
Half13.11 mi0.68 mi19957-357452-247452-2420642(Top 73%)7827(Top 64%)7827(Top 143%)
25K15.53 mi2.42 mi19925+327439+137439+1319897(Top 70%)7472(Top 61%)7472(Top 137%)
30K18.64 mi3.11 mi19733+1927373+667373+6618998(Top 67%)7120(Top 58%)7120(Top 130%)
20M20.00 mi1.36 mi19573+1607305+687305+6817553(Top 62%)6450(Top 53%)6450(Top 118%)
21M21.00 mi1.00 mi19445+1287259+467259+4617790(Top 63%)6687(Top 55%)6687(Top 122%)
35K21.75 mi0.75 mi19285+1607178+817178+8114392(Top 51%)4923(Top 40%)4923(Top 90%)
23M23.00 mi1.25 mi19124+1617115+637115+6316364(Top 58%)6101(Top 50%)6101(Top 112%)
24M24.00 mi1.00 mi19019+1057077+387077+3816795(Top 59%)6385(Top 52%)6385(Top 117%)
40K24.85 mi0.85 mi18855+1647020+577020+5715083(Top 53%)5578(Top 46%)5578(Top 102%)
25.2M25.20 mi0.35 mi18755+1006973+476973+4712132(Top 43%)4073(Top 33%)4073(Top 74%)
Finish26.22 mi1.02 mi18576+1796890+836890+8313608(Top 48%)4766(Top 39%)4766(Top 87%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 71%
×21story building
+97ft-345ft

Overall

20172

Females

7526

F18-39

7526

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

20356

Females

7668

F18-39

7668

10K→15K

6.2 - 9.3 mi

Top 71%
×3story building
+67ft-78ft

Overall

20172

Females

7526

F18-39

7526

15K→20K

9.3 - 12.4 mi

Top 70%
×5story building
+106ft-86ft

Overall

20008

Females

7482

F18-39

7482

20K→Half

12.4 - 13.1 mi

Top 73%
×2story building
+19ft-37ft

Overall

20642

Females

7827

F18-39

7827

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

19897

Females

7472

F18-39

7472

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

18998

Females

7120

F18-39

7120

30K→20M

18.6 - 20.0 mi

Top 62%
×5story building
+64ft-50ft

Overall

17553

Females

6450

F18-39

6450

20M→21M

20.0 - 21.0 mi

Top 63%
×8story building
+106ft-24ft

Overall

17790

Females

6687

F18-39

6687

21M→35K

21.0 - 21.8 mi

Top 51%
×7story building
+17ft-86ft

Overall

14392

Females

4923

F18-39

4923

35K→23M

21.8 - 23.0 mi

Top 58%
×5story building
+23ft-63ft

Overall

16364

Females

6101

F18-39

6101

23M→24M

23.0 - 24.0 mi

Top 59%
×6story building
+12ft-82ft

Overall

16795

Females

6385

F18-39

6385

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

15083

Females

5578

F18-39

5578

40K→25.2M

24.9 - 25.2 mi

Top 43%
×1story
+13ft-16ft

Overall

12132

Females

4073

F18-39

4073

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

13608

Females

4766

F18-39

4766

Passing Analysis

Category:
Athletes Passed
2202
Passed By
1561
Net Change
+641
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19217
5K → 10K85660-575#19217#19792
10K → 15K142284-142#19792#19934
15K → 20K199187+12#19934#19922
20K → Half2156-35#19922#19957
Half → 25K174142+32#19957#19925
25K → 30K320128+192#19925#19733
30K → 20M18323+160#19733#19573
20M → 21M15729+128#19573#19445
21M → 35K1611+160#19445#19285
35K → 23M17817+161#19285#19124
23M → 24M12722+105#19124#19019
24M → 40K1684+164#19019#18855
40K → 25.2M1000+100#18855#18755
25.2M → Finish1878+179#18755#18576
TOTALS22021561+641
📊

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