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BOSTON MARATHON 2025

Brenda Diaz

Bib: 21250•F

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 42%
Masters (Masters Women)
#0 / 6759
Top 28%
Division (F45-49)
#0 / 1813
Top 34%
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
8:07/mi
25:13
↑ 97↓ 3451.5%
10K· 6.21 mi
8:11/mi
50:38
↑ 79↓ 1380.4%
15K· 9.32 mi
8:15/mi
1:16:16
↑ 67↓ 78
20K· 12.43 mi
8:16/mi
1:41:56
↑ 106↓ 860.1%
Half· 13.11 mi
7:58/mi
1:47:22
↑ 19↓ 370.5%
25K· 15.53 mi
8:19/mi
2:07:33
↑ 66↓ 880.2%
30K· 18.64 mi
8:30/mi
2:33:59
↑ 181↓ 1480.2%
20M
8:33/mi
2:45:36
↑ 64↓ 500.2%
21M
8:59/mi
2:54:35
↑ 106↓ 241.6%
35K· 21.75 mi
8:11/mi
3:00:42
↑ 17↓ 861.7%
23M
8:26/mi
3:11:15
↑ 23↓ 630.6%
24M
8:24/mi
3:19:39
↓ 821.3%
40K· 24.85 mi
8:26/mi
3:26:52
↓ 200.3%
25.2M
8:59/mi
3:29:58
↑ 13↓ 160.2%
Finish· 26.22 mi
8:18/mi
3:38:25
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:47:22
Pace8:11 /mi
2nd Half
Distance13.11 mi
Time1:51:03
Pace8:28 /mi
📊Positive Split: 3.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:0025:138:0725:13
8:07
-
10K
6.21 mi11:43:2550:388:0925:25
8:11
+0:04
15K
9.32 mi12:09:031:16:168:1125:38
8:15
+0:04
20K
12.43 mi12:34:431:41:568:1225:40
8:16
+0:01
Half
13.11 mi12:40:091:47:228:115:26
7:58
-0:18
25K
15.53 mi13:00:202:07:338:1320:11
8:19
+0:21
30K
18.64 mi13:26:462:33:598:1626:26
8:30
+0:11
20M
20.00 mi13:38:232:45:368:1711:37
8:33
+0:03
21M
21.00 mi13:47:222:54:358:198:59
8:59
+0:26
35K
21.75 mi13:53:293:00:428:196:07
8:11
-0:48
23M
23.00 mi14:04:023:11:158:1910:33
8:26
+0:15
24M
24.00 mi14:12:263:19:398:198:24
8:24
-0:02
40K
24.85 mi14:19:393:26:528:197:13
8:26
+0:02
25.2M
25.20 mi14:22:453:29:588:203:06
8:59
+0:33
Finish
26.22 mi14:31:123:38:258:208:27
8:18
-0:41

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

7:58 /mi

Average Pace

8:20 /mi

Slowest Pace

8:59 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:26:20

94% of race

Time at Steady Pace

12:05

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:20 /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 mi11:18:0025:138:0725:13
8:07
#17482
10K
6.21 mi11:43:2550:388:0925:25
8:11
#17630
15K
9.32 mi12:09:031:16:168:1125:38
8:15
#17653
20K
12.43 mi12:34:431:41:568:1225:40
8:16
#17360
Half
13.11 mi12:40:091:47:228:115:26
7:58
#17266
25K
15.53 mi13:00:202:07:338:1320:11
8:19
#17019
30K
18.64 mi13:26:462:33:598:1626:26
8:30
#16592
20M
20.00 mi13:38:232:45:368:1711:37
8:33
#16363
21M
21.00 mi13:47:222:54:358:198:59
8:59
#16170
35K
21.75 mi13:53:293:00:428:196:07
8:11
#16040
23M
23.00 mi14:04:023:11:158:1910:33
8:26
#15778
24M
24.00 mi14:12:263:19:398:198:24
8:24
#15686
40K
24.85 mi14:19:393:26:528:197:13
8:26
#15580
25.2M
25.20 mi14:22:453:29:588:203:06
8:59
#15515
Finish
26.22 mi14:31:123:38:258:208:27
8:18
#15471
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi174826017601717739(Top 62%)6157(Top 50%)6157(Top 340%)
10K6.21 mi3.10 mi17630-1486112-956112-9517759(Top 63%)6152(Top 50%)6152(Top 339%)
15K9.32 mi3.11 mi17653-236114-26114-217739(Top 62%)6157(Top 50%)6157(Top 340%)
20K12.43 mi3.11 mi17360+2935953+1615953+16116704(Top 59%)5605(Top 46%)5605(Top 309%)
Half13.11 mi0.68 mi17266+945905+485905+4815674(Top 55%)4994(Top 41%)4994(Top 275%)
25K15.53 mi2.42 mi17019+2475775+1305775+13016083(Top 57%)5355(Top 44%)5355(Top 295%)
30K18.64 mi3.11 mi16592+4275576+1995576+19914815(Top 52%)4806(Top 39%)4806(Top 265%)
20M20.00 mi1.36 mi16363+2295470+1065470+10614116(Top 50%)4580(Top 37%)4580(Top 253%)
21M21.00 mi1.00 mi16170+1935392+785392+7813433(Top 47%)4339(Top 35%)4339(Top 239%)
35K21.75 mi0.75 mi16040+1305348+445348+4413523(Top 48%)4454(Top 36%)4454(Top 246%)
23M23.00 mi1.25 mi15778+2625241+1075241+10712875(Top 45%)4207(Top 34%)4207(Top 232%)
24M24.00 mi1.00 mi15686+925199+425199+4213915(Top 49%)4782(Top 39%)4782(Top 264%)
40K24.85 mi0.85 mi15580+1065172+275172+2713084(Top 46%)4495(Top 37%)4495(Top 248%)
25.2M25.20 mi0.35 mi15515+655149+235149+2311843(Top 42%)3919(Top 32%)3919(Top 216%)
Finish26.22 mi1.02 mi15471+445141+85141+814888(Top 52%)5416(Top 44%)5416(Top 299%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 62%
×21story building
+97ft-345ft

Overall

17739

Females

6157

F45-49

6157

5K→10K

3.1 - 6.2 mi

Top 63%
×5story building
+79ft-138ft

Overall

17759

Females

6152

F45-49

6152

10K→15K

6.2 - 9.3 mi

Top 62%
×3story building
+67ft-78ft

Overall

17739

Females

6157

F45-49

6157

15K→20K

9.3 - 12.4 mi

Top 59%
×5story building
+106ft-86ft

Overall

16704

Females

5605

F45-49

5605

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

15674

Females

4994

F45-49

4994

Half→25K

13.1 - 15.5 mi

Top 57%
×4story building
+66ft-88ft

Overall

16083

Females

5355

F45-49

5355

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

14815

Females

4806

F45-49

4806

30K→20M

18.6 - 20.0 mi

Top 50%
×5story building
+64ft-50ft

Overall

14116

Females

4580

F45-49

4580

20M→21M

20.0 - 21.0 mi

Top 47%
×8story building
+106ft-24ft

Overall

13433

Females

4339

F45-49

4339

21M→35K

21.0 - 21.8 mi

Top 48%
×7story building
+17ft-86ft

Overall

13523

Females

4454

F45-49

4454

35K→23M

21.8 - 23.0 mi

Top 45%
×5story building
+23ft-63ft

Overall

12875

Females

4207

F45-49

4207

23M→24M

23.0 - 24.0 mi

Top 49%
×6story building
+12ft-82ft

Overall

13915

Females

4782

F45-49

4782

24M→40K

24.0 - 24.9 mi

Top 46%
×1story
+6ft-20ft

Overall

13084

Females

4495

F45-49

4495

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11843

Females

3919

F45-49

3919

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

14888

Females

5416

F45-49

5416

Passing Analysis

Category:
Athletes Passed
2866
Passed By
855
Net Change
+2011
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17482
5K → 10K213361-148#17482#17630
10K → 15K180203-23#17630#17653
15K → 20K34956+293#17653#17360
20K → Half995+94#17360#17266
Half → 25K29447+247#17266#17019
25K → 30K47144+427#17019#16592
30K → 20M24314+229#16592#16363
20M → 21M21219+193#16363#16170
21M → 35K14313+130#16170#16040
35K → 23M2686+262#16040#15778
23M → 24M11220+92#15778#15686
24M → 40K13226+106#15686#15580
40K → 25.2M705+65#15580#15515
25.2M → Finish8036+44#15515#15471
TOTALS2866855+2011
📊

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