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BOSTON MARATHON 2025

Brienne Marshall

Bib: 31743•F

MA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F40-44)
#0 / 1718
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
9:15/mi
28:44
↑ 97↓ 3451.5%
10K· 6.21 mi
9:05/mi
56:58
↑ 79↓ 1380.4%
15K· 9.32 mi
9:00/mi
1:24:55
↑ 67↓ 78
20K· 12.43 mi
9:13/mi
1:53:34
↑ 106↓ 860.1%
Half· 13.11 mi
9:07/mi
1:59:47
↑ 19↓ 370.5%
25K· 15.53 mi
9:17/mi
2:22:17
↑ 66↓ 880.2%
30K· 18.64 mi
9:39/mi
2:52:16
↑ 181↓ 1480.2%
20M
9:52/mi
3:05:41
↑ 64↓ 500.2%
21M
10:09/mi
3:15:50
↑ 106↓ 241.6%
35K· 21.75 mi
9:03/mi
3:22:36
↑ 17↓ 861.7%
23M
9:27/mi
3:34:26
↑ 23↓ 630.6%
24M
9:10/mi
3:43:36
↓ 821.3%
40K· 24.85 mi
9:40/mi
3:51:52
↓ 200.3%
25.2M
10:15/mi
3:55:24
↑ 13↓ 160.2%
Finish· 26.22 mi
9:11/mi
4:04:45
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:59:47
Pace9:08 /mi
2nd Half
Distance13.11 mi
Time2:04:58
Pace9:32 /mi
📊Positive Split: 4.3% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:52:1528:449:1528:44
9:15
-
10K
6.21 mi12:20:2956:589:1028:14
9:05
-0:10
15K
9.32 mi12:48:261:24:559:0727:57
9:00
-0:05
20K
12.43 mi13:17:051:53:349:0828:39
9:13
+0:13
Half
13.11 mi13:23:181:59:479:086:13
9:07
-0:06
25K
15.53 mi13:45:482:22:179:1022:30
9:17
+0:10
30K
18.64 mi14:15:472:52:169:1429:59
9:39
+0:22
20M
20.00 mi14:29:123:05:419:1713:25
9:52
+0:13
21M
21.00 mi14:39:213:15:509:2010:09
10:09
+0:17
35K
21.75 mi14:46:073:22:369:196:46
9:03
-1:06
23M
23.00 mi14:57:573:34:269:1911:50
9:27
+0:24
24M
24.00 mi15:07:073:43:369:199:10
9:10
-0:17
40K
24.85 mi15:15:233:51:529:208:16
9:40
+0:30
25.2M
25.20 mi15:18:553:55:249:203:32
10:15
+0:35
Finish
26.22 mi15:28:164:04:459:209:21
9:11
-1:04

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

9:00 /mi

Average Pace

9:20 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:51:04

94% of race

Time at Steady Pace

13:41

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:20 /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 mi11:52:1528:449:1528:44
9:15
#23392
10K
6.21 mi12:20:2956:589:1028:14
9:05
#23090
15K
9.32 mi12:48:261:24:559:0727:57
9:00
#22746
20K
12.43 mi13:17:051:53:349:0828:39
9:13
#22516
Half
13.11 mi13:23:181:59:479:086:13
9:07
#22517
25K
15.53 mi13:45:482:22:179:1022:30
9:17
#22284
30K
18.64 mi14:15:472:52:169:1429:59
9:39
#21941
20M
20.00 mi14:29:123:05:419:1713:25
9:52
#21808
21M
21.00 mi14:39:213:15:509:2010:09
10:09
#21634
35K
21.75 mi14:46:073:22:369:196:46
9:03
#21524
23M
23.00 mi14:57:573:34:269:1911:50
9:27
#21324
24M
24.00 mi15:07:073:43:369:199:10
9:10
#21196
40K
24.85 mi15:15:233:51:529:208:16
9:40
#21118
25.2M
25.20 mi15:18:553:55:249:203:32
10:15
#21067
Finish
26.22 mi15:28:164:04:459:209:21
9:11
#21016
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi233929382938222024(Top 78%)8567(Top 70%)8567(Top 499%)
10K6.21 mi3.10 mi23090+3029199+1839199+18322774(Top 80%)9009(Top 74%)9009(Top 524%)
15K9.32 mi3.11 mi22746+3448980+2198980+21922024(Top 78%)8567(Top 70%)8567(Top 499%)
20K12.43 mi3.11 mi22516+2308873+1078873+10721972(Top 77%)8565(Top 70%)8565(Top 499%)
Half13.11 mi0.68 mi22517-18873887322273(Top 78%)8755(Top 72%)8755(Top 510%)
25K15.53 mi2.42 mi22284+2338754+1198754+11921106(Top 74%)8155(Top 67%)8155(Top 475%)
30K18.64 mi3.11 mi21941+3438590+1648590+16420552(Top 72%)7964(Top 65%)7964(Top 464%)
20M20.00 mi1.36 mi21808+1338531+598531+5920538(Top 72%)8102(Top 66%)8102(Top 472%)
21M21.00 mi1.00 mi21634+1748466+658466+6518886(Top 66%)7284(Top 60%)7284(Top 424%)
35K21.75 mi0.75 mi21524+1108412+548412+5418516(Top 65%)7216(Top 59%)7216(Top 420%)
23M23.00 mi1.25 mi21324+2008337+758337+7518501(Top 65%)7243(Top 59%)7243(Top 422%)
24M24.00 mi1.00 mi21196+1288288+498288+4918228(Top 64%)7167(Top 59%)7167(Top 417%)
40K24.85 mi0.85 mi21118+788266+228266+2219375(Top 68%)7827(Top 64%)7827(Top 456%)
25.2M25.20 mi0.35 mi21067+518246+208246+2018166(Top 64%)7241(Top 59%)7241(Top 421%)
Finish26.22 mi1.02 mi21016+518232+148232+1419869(Top 70%)8079(Top 66%)8079(Top 470%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 78%
×21story building
+97ft-345ft

Overall

22024

Females

8567

F40-44

8567

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

22774

Females

9009

F40-44

9009

10K→15K

6.2 - 9.3 mi

Top 78%
×3story building
+67ft-78ft

Overall

22024

Females

8567

F40-44

8567

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

21972

Females

8565

F40-44

8565

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

22273

Females

8755

F40-44

8755

Half→25K

13.1 - 15.5 mi

Top 74%
×4story building
+66ft-88ft

Overall

21106

Females

8155

F40-44

8155

25K→30K

15.5 - 18.6 mi

Top 72%
×9story building
+181ft-148ft

Overall

20552

Females

7964

F40-44

7964

30K→20M

18.6 - 20.0 mi

Top 72%
×5story building
+64ft-50ft

Overall

20538

Females

8102

F40-44

8102

20M→21M

20.0 - 21.0 mi

Top 66%
×8story building
+106ft-24ft

Overall

18886

Females

7284

F40-44

7284

21M→35K

21.0 - 21.8 mi

Top 65%
×7story building
+17ft-86ft

Overall

18516

Females

7216

F40-44

7216

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18501

Females

7243

F40-44

7243

23M→24M

23.0 - 24.0 mi

Top 64%
×6story building
+12ft-82ft

Overall

18228

Females

7167

F40-44

7167

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19375

Females

7827

F40-44

7827

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

18166

Females

7241

F40-44

7241

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19869

Females

8079

F40-44

8079

Passing Analysis

Category:
Athletes Passed
2818
Passed By
442
Net Change
+2376
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#23392
5K → 10K413111+302#23392#23090
10K → 15K38339+344#23090#22746
15K → 20K28959+230#22746#22516
20K → Half3435-1#22516#22517
Half → 25K27643+233#22517#22284
25K → 30K39148+343#22284#21941
30K → 20M15926+133#21941#21808
20M → 21M19218+174#21808#21634
21M → 35K1144+110#21634#21524
35K → 23M21313+200#21524#21324
23M → 24M1346+128#21324#21196
24M → 40K9416+78#21196#21118
40K → 25.2M521+51#21118#21067
25.2M → Finish7423+51#21067#21016
TOTALS2818442+2376
📊

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