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BOSTON MARATHON 2025

Lauren Brizzolara

Bib: 17739•F

DC

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
8:25/mi
26:10
↑ 97↓ 3451.5%
10K· 6.21 mi
9:00/mi
54:09
↑ 79↓ 1380.4%
15K· 9.32 mi
10:02/mi
1:25:20
↑ 67↓ 78
20K· 12.43 mi
11:14/mi
2:00:14
↑ 106↓ 860.1%
Half· 13.11 mi
8:49/mi
2:06:15
↑ 19↓ 370.5%
25K· 15.53 mi
11:09/mi
2:33:18
↑ 66↓ 880.2%
30K· 18.64 mi
12:27/mi
3:11:58
↑ 181↓ 1480.2%
20M
14:06/mi
3:31:07
↑ 64↓ 500.2%
21M
10:39/mi
3:41:46
↑ 106↓ 241.6%
35K· 21.75 mi
8:31/mi
3:48:08
↑ 17↓ 861.7%
23M
9:34/mi
4:00:07
↑ 23↓ 630.6%
24M
9:12/mi
4:09:19
↓ 821.3%
40K· 24.85 mi
10:23/mi
4:18:12
↓ 200.3%
25.2M
10:47/mi
4:21:55
↑ 13↓ 160.2%
Finish· 26.22 mi
8:22/mi
4:30:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:06:15
Pace9:38 /mi
2nd Half
Distance13.11 mi
Time2:24:12
Pace11:00 /mi
📊Positive Split: 14.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:3626:108:2526:10
8:25
-
10K
6.21 mi11:44:3554:098:4327:59
9:00
+0:35
15K
9.32 mi12:15:461:25:209:0931:11
10:02
+1:02
20K
12.43 mi12:50:402:00:149:4034:54
11:14
+1:12
Half
13.11 mi12:56:412:06:159:386:01
8:49
-2:25
25K
15.53 mi13:23:442:33:189:5227:03
11:09
+2:20
30K
18.64 mi14:02:243:11:5810:1838:40
12:27
+1:18
20M
20.00 mi14:21:333:31:0710:3319:09
14:06
+1:39
21M
21.00 mi14:32:123:41:4610:3410:39
10:39
-3:27
35K
21.75 mi14:38:343:48:0810:296:22
8:31
-2:08
23M
23.00 mi14:50:334:00:0710:2611:59
9:34
+1:03
24M
24.00 mi14:59:454:09:1910:239:12
9:12
-0:22
40K
24.85 mi15:08:384:18:1210:238:53
10:23
+1:11
25.2M
25.20 mi15:12:214:21:5510:243:43
10:47
+0:24
Finish
26.22 mi15:20:534:30:2710:198:32
8:22
-2:25

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

8:22 /mi

Average Pace

10:19 /mi

Slowest Pace

14:06 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:24:16

31% of race

Time at Steady Pace

1:06:25

25% of race

Time at Slower Pace

1:59:46

44% of race

Average Pace: 10:19 /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 mi11:16:3626:108:2526:10
8:25
#19449
10K
6.21 mi11:44:3554:098:4327:59
9:00
#20985
15K
9.32 mi12:15:461:25:209:0931:11
10:02
#22925
20K
12.43 mi12:50:402:00:149:4034:54
11:14
#24238
Half
13.11 mi12:56:412:06:159:386:01
8:49
#24096
25K
15.53 mi13:23:442:33:189:5227:03
11:09
#24419
30K
18.64 mi14:02:243:11:5810:1838:40
12:27
#24864
20M
20.00 mi14:21:333:31:0710:3319:09
14:06
#25166
21M
21.00 mi14:32:123:41:4610:3410:39
10:39
#24990
35K
21.75 mi14:38:343:48:0810:296:22
8:31
#24792
23M
23.00 mi14:50:334:00:0710:2611:59
9:34
#24575
24M
24.00 mi14:59:454:09:1910:239:12
9:12
#24378
40K
24.85 mi15:08:384:18:1210:238:53
10:23
#24289
25.2M
25.20 mi15:12:214:21:5510:243:43
10:47
#24246
Finish
26.22 mi15:20:534:30:2710:198:32
8:22
#24065
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi194497168716825067(Top 88%)10252(Top 84%)10252(Top 187%)
10K6.21 mi3.10 mi20985-15368048-8808048-88022422(Top 79%)8828(Top 72%)8828(Top 161%)
15K9.32 mi3.11 mi22925-19409085-10379085-103725067(Top 88%)10252(Top 84%)10252(Top 187%)
20K12.43 mi3.11 mi24238-13139827-7429827-74226330(Top 93%)10992(Top 90%)10992(Top 201%)
Half13.11 mi0.68 mi24096+1429747+809747+8021058(Top 74%)8091(Top 66%)8091(Top 148%)
25K15.53 mi2.42 mi24419-3239937-1909937-19025429(Top 90%)10529(Top 86%)10529(Top 193%)
30K18.64 mi3.11 mi24864-44510202-26510202-26526115(Top 92%)11003(Top 90%)11003(Top 201%)
20M20.00 mi1.36 mi25166-30210390-18810390-18827366(Top 96%)11746(Top 96%)11746(Top 215%)
21M21.00 mi1.00 mi24990+17610301+8910301+8920480(Top 72%)8180(Top 67%)8180(Top 150%)
35K21.75 mi0.75 mi24792+19810198+10310198+10315597(Top 55%)5587(Top 46%)5587(Top 102%)
23M23.00 mi1.25 mi24575+21710103+9510103+9519000(Top 67%)7523(Top 62%)7523(Top 138%)
24M24.00 mi1.00 mi24378+19710006+9710006+9718388(Top 65%)7253(Top 59%)7253(Top 133%)
40K24.85 mi0.85 mi24289+899968+389968+3821637(Top 76%)9011(Top 74%)9011(Top 165%)
25.2M25.20 mi0.35 mi24246+439955+139955+1320038(Top 71%)8199(Top 67%)8199(Top 150%)
Finish26.22 mi1.02 mi24065+1819871+849871+8415453(Top 54%)5742(Top 47%)5742(Top 105%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 88%
×21story building
+97ft-345ft

Overall

25067

Females

10252

F18-39

10252

5K→10K

3.1 - 6.2 mi

Top 79%
×5story building
+79ft-138ft

Overall

22422

Females

8828

F18-39

8828

10K→15K

6.2 - 9.3 mi

Top 88%
×3story building
+67ft-78ft

Overall

25067

Females

10252

F18-39

10252

15K→20K

9.3 - 12.4 mi

Top 93%
×5story building
+106ft-86ft

Overall

26330

Females

10992

F18-39

10992

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

21058

Females

8091

F18-39

8091

Half→25K

13.1 - 15.5 mi

Top 90%
×4story building
+66ft-88ft

Overall

25429

Females

10529

F18-39

10529

25K→30K

15.5 - 18.6 mi

Top 92%
×9story building
+181ft-148ft

Overall

26115

Females

11003

F18-39

11003

30K→20M

18.6 - 20.0 mi

Top 96%
×5story building
+64ft-50ft

Overall

27366

Females

11746

F18-39

11746

20M→21M

20.0 - 21.0 mi

Top 72%
×8story building
+106ft-24ft

Overall

20480

Females

8180

F18-39

8180

21M→35K

21.0 - 21.8 mi

Top 55%
×7story building
+17ft-86ft

Overall

15597

Females

5587

F18-39

5587

35K→23M

21.8 - 23.0 mi

Top 67%
×5story building
+23ft-63ft

Overall

19000

Females

7523

F18-39

7523

23M→24M

23.0 - 24.0 mi

Top 65%
×6story building
+12ft-82ft

Overall

18388

Females

7253

F18-39

7253

24M→40K

24.0 - 24.9 mi

Top 76%
×1story
+6ft-20ft

Overall

21637

Females

9011

F18-39

9011

40K→25.2M

24.9 - 25.2 mi

Top 71%
×1story
+13ft-16ft

Overall

20038

Females

8199

F18-39

8199

25.2M→Finish

25.2 - 26.2 mi

Top 54%
×2story building
+22ft-21ft

Overall

15453

Females

5742

F18-39

5742

Passing Analysis

Category:
Athletes Passed
1396
Passed By
6012
Net Change
-4616
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#19449
5K → 10K211557-1536#19449#20985
10K → 15K171957-1940#20985#22925
15K → 20K71320-1313#22925#24238
20K → Half1431+142#24238#24096
Half → 25K45368-323#24096#24419
25K → 30K40485-445#24419#24864
30K → 20M11313-302#24864#25166
20M → 21M1771+176#25166#24990
21M → 35K1980+198#24990#24792
35K → 23M2181+217#24792#24575
23M → 24M1981+197#24575#24378
24M → 40K967+89#24378#24289
40K → 25.2M441+43#24289#24246
25.2M → Finish1810+181#24246#24065
TOTALS13966012-4616
📊

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