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BOSTON MARATHON 2025

Brenna Smith

Bib: 12788•F

MS

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 40%
Gender (Female)
#0 / 12228
Top 24%
Division (F18-39)
#0 / 5469
Top 40%
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
7:11/mi
22:19
↑ 97↓ 3451.5%
10K· 6.21 mi
6:52/mi
43:39
↑ 79↓ 1380.4%
15K· 9.32 mi
7:01/mi
1:05:28
↑ 67↓ 78
20K· 12.43 mi
7:32/mi
1:28:51
↑ 106↓ 860.1%
Half· 13.11 mi
7:21/mi
1:33:52
↑ 19↓ 370.5%
25K· 15.53 mi
7:29/mi
1:52:00
↑ 66↓ 880.2%
30K· 18.64 mi
8:03/mi
2:17:01
↑ 181↓ 1480.2%
20M
8:26/mi
2:28:28
↑ 64↓ 500.2%
21M
9:26/mi
2:37:54
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
2:44:16
↑ 17↓ 861.7%
23M
9:06/mi
2:55:40
↑ 23↓ 630.6%
24M
8:56/mi
3:04:36
↓ 821.3%
40K· 24.85 mi
9:10/mi
3:12:26
↓ 200.3%
25.2M
9:14/mi
3:15:37
↑ 13↓ 160.2%
Finish· 26.22 mi
8:01/mi
3:23:47
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:33:52
Pace7:10 /mi
2nd Half
Distance13.11 mi
Time1:49:55
Pace8:23 /mi
📊Positive Split: 17.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:5322:197:1122:19
7:11
-
10K
6.21 mi11:11:1343:397:0121:20
6:52
-0:19
15K
9.32 mi11:33:021:05:287:0121:49
7:01
+0:09
20K
12.43 mi11:56:251:28:517:0923:23
7:32
+0:31
Half
13.11 mi12:01:261:33:527:105:01
7:21
-0:11
25K
15.53 mi12:19:341:52:007:1318:08
7:29
+0:08
30K
18.64 mi12:44:352:17:017:2125:01
8:03
+0:34
20M
20.00 mi12:56:022:28:287:2511:27
8:26
+0:23
21M
21.00 mi13:05:282:37:547:319:26
9:26
+1:00
35K
21.75 mi13:11:502:44:167:336:22
8:31
-0:55
23M
23.00 mi13:23:142:55:407:3811:24
9:06
+0:35
24M
24.00 mi13:32:103:04:367:428:56
8:56
-0:10
40K
24.85 mi13:40:003:12:267:457:50
9:10
+0:14
25.2M
25.20 mi13:43:113:15:377:463:11
9:14
+0:04
Finish
26.22 mi13:51:213:23:477:478:10
8:01
-1:13

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

6:52 /mi

Average Pace

7:47 /mi

Slowest Pace

9:26 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:52:00

55% of race

Time at Steady Pace

44:38

22% of race

Time at Slower Pace

47:09

23% of race

Average Pace: 7:46 /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 mi10:49:5322:197:1122:19
7:11
#9339
10K
6.21 mi11:11:1343:397:0121:20
6:52
#8066
15K
9.32 mi11:33:021:05:287:0121:49
7:01
#7934
20K
12.43 mi11:56:251:28:517:0923:23
7:32
#8545
Half
13.11 mi12:01:261:33:527:105:01
7:21
#8639
25K
15.53 mi12:19:341:52:007:1318:08
7:29
#8760
30K
18.64 mi12:44:352:17:017:2125:01
8:03
#9276
20M
20.00 mi12:56:022:28:287:2511:27
8:26
#9581
21M
21.00 mi13:05:282:37:547:319:26
9:26
#9991
35K
21.75 mi13:11:502:44:167:336:22
8:31
#10214
23M
23.00 mi13:23:142:55:407:3811:24
9:06
#10646
24M
24.00 mi13:32:103:04:367:428:56
8:56
#10949
40K
24.85 mi13:40:003:12:267:457:50
9:10
#11200
25.2M
25.20 mi13:43:113:15:377:463:11
9:14
#11217
Finish
26.22 mi13:51:213:23:477:478:10
8:01
#11269
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi9339152815287791(Top 27%)971(Top 8%)971(Top 18%)
10K6.21 mi3.10 mi8066+12731022+5061022+5067015(Top 25%)717(Top 6%)717(Top 13%)
15K9.32 mi3.11 mi7934+132973+49973+497791(Top 27%)971(Top 8%)971(Top 18%)
20K12.43 mi3.11 mi8545-6111235-2621235-26211010(Top 39%)2482(Top 20%)2482(Top 45%)
Half13.11 mi0.68 mi8639-941281-461281-4610569(Top 37%)2234(Top 18%)2234(Top 41%)
25K15.53 mi2.42 mi8760-1211345-641345-649823(Top 35%)2033(Top 17%)2033(Top 37%)
30K18.64 mi3.11 mi9276-5161632-2871632-28711765(Top 41%)3167(Top 26%)3167(Top 58%)
20M20.00 mi1.36 mi9581-3051806-1741806-17413321(Top 47%)4145(Top 34%)4145(Top 76%)
21M21.00 mi1.00 mi9991-4102026-2202026-22015784(Top 56%)5587(Top 46%)5587(Top 102%)
35K21.75 mi0.75 mi10214-2232167-1412167-14115542(Top 55%)5532(Top 45%)5532(Top 101%)
23M23.00 mi1.25 mi10646-4322427-2602427-26016841(Top 59%)6348(Top 52%)6348(Top 116%)
24M24.00 mi1.00 mi10949-3032631-2042631-20417022(Top 60%)6504(Top 53%)6504(Top 119%)
40K24.85 mi0.85 mi11200-2512798-1672798-16717175(Top 60%)6670(Top 55%)6670(Top 122%)
25.2M25.20 mi0.35 mi11217-172821-232821-2313111(Top 46%)4530(Top 37%)4530(Top 83%)
Finish26.22 mi1.02 mi11269-522891-702891-7012985(Top 46%)4421(Top 36%)4421(Top 81%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 27%
×21story building
+97ft-345ft

Overall

7791

Females

971

F18-39

971

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

7015

Females

717

F18-39

717

10K→15K

6.2 - 9.3 mi

Top 27%
×3story building
+67ft-78ft

Overall

7791

Females

971

F18-39

971

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

11010

Females

2482

F18-39

2482

20K→Half

12.4 - 13.1 mi

Top 37%
×2story building
+19ft-37ft

Overall

10569

Females

2234

F18-39

2234

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

9823

Females

2033

F18-39

2033

25K→30K

15.5 - 18.6 mi

Top 41%
×9story building
+181ft-148ft

Overall

11765

Females

3167

F18-39

3167

30K→20M

18.6 - 20.0 mi

Top 47%
×5story building
+64ft-50ft

Overall

13321

Females

4145

F18-39

4145

20M→21M

20.0 - 21.0 mi

Top 56%
×8story building
+106ft-24ft

Overall

15784

Females

5587

F18-39

5587

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15542

Females

5532

F18-39

5532

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

16841

Females

6348

F18-39

6348

23M→24M

23.0 - 24.0 mi

Top 60%
×6story building
+12ft-82ft

Overall

17022

Females

6504

F18-39

6504

24M→40K

24.0 - 24.9 mi

Top 60%
×1story
+6ft-20ft

Overall

17175

Females

6670

F18-39

6670

40K→25.2M

24.9 - 25.2 mi

Top 46%
×1story
+13ft-16ft

Overall

13111

Females

4530

F18-39

4530

25.2M→Finish

25.2 - 26.2 mi

Top 46%
×2story building
+22ft-21ft

Overall

12985

Females

4421

F18-39

4421

Passing Analysis

Category:
Athletes Passed
2016
Passed By
3943
Net Change
-1930
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#9339
5K → 10K12818+1273#9339#8066
10K → 15K21179+132#8066#7934
15K → 20K43654-611#7934#8545
20K → Half8102-94#8545#8639
Half → 25K105226-121#8639#8760
25K → 30K105621-516#8760#9276
30K → 20M41346-305#9276#9581
20M → 21M28437-410#9581#9991
21M → 35K21242-223#9991#10214
35K → 23M34466-432#10214#10646
23M → 24M24327-303#10646#10949
24M → 40K25276-251#10949#11200
40K → 25.2M3249-17#11200#11217
25.2M → Finish58110-52#11217#11269
TOTALS20163943-1930
📊

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