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BOSTON MARATHON 2025

Brenley Mason

Bib: 8939•F

UT

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 14%
Gender (Female)
#0 / 12228
Top 2%
Division (F18-39)
#0 / 5469
Top 5%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
21:10
Rank: #6427
Start → 5K
21:10 | 6:49/mi
10K· 6.21 mi
42:19
Rank: #6413 (+14)
5K → 10K
21:09 | 6:48/mi
15K· 9.32 mi
1:03:36
Rank: #6444 (-31)
10K → 15K
21:17 | 6:51/mi
20K· 12.43 mi
1:25:05
Rank: #6375 (+69)
15K → 20K
21:29 | 6:55/mi
Half· 13.11 mi
1:29:48
Rank: #6420 (-45)
20K → Half
4:43 | 6:55/mi
25K· 15.53 mi
1:46:29
Rank: #6204 (+216)
Half → 25K
16:41 | 6:53/mi
30K· 18.64 mi
2:07:32
Rank: #5522 (+682)
25K → 30K
21:03 | 6:47/mi
20M
2:16:42
Rank: #5227 (+295)
30K → 20M
9:10 | 6:45/mi
21M
2:23:37
Rank: #4943 (+284)
20M → 21M
6:55 | 6:55/mi
35K· 21.75 mi
2:28:22
Rank: #4731 (+212)
21M → 35K
4:45 | 6:21/mi
23M
2:36:37
Rank: #4454 (+277)
35K → 23M
8:15 | 6:35/mi
24M
2:43:00
Rank: #4239 (+215)
23M → 24M
6:23 | 6:23/mi
40K· 24.85 mi
2:48:36
Rank: #4101 (+138)
24M → 40K
5:36 | 6:33/mi
25.2M
2:51:05
Rank: #4042 (+59)
40K → 25.2M
2:29 | 7:12/mi
Finish· 26.22 mi
2:57:33
Rank: #3909 (+133)
25.2M → Finish
6:28 | 6:21/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:29:48
Pace6:51 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:27:45
Pace6:42 /mi
📊Negative Split: 2.3% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:46:4321:106:4921:10
6:49
-
10K
6.21 mi11:07:5242:196:4921:09
6:48
-0:01
15K
9.32 mi11:29:091:03:366:4921:17
6:51
+0:03
20K
12.43 mi11:50:381:25:056:5121:29
6:55
+0:04
Half
13.11 mi11:55:211:29:486:514:43
6:55
0:00
25K
15.53 mi12:12:021:46:296:5116:41
6:53
-0:02
30K
18.64 mi12:33:052:07:326:5021:03
6:47
-0:06
20M
20.00 mi12:42:152:16:426:509:10
6:45
-0:02
21M
21.00 mi12:49:102:23:376:506:55
6:55
+0:10
35K
21.75 mi12:53:552:28:226:494:45
6:21
-0:34
23M
23.00 mi13:02:102:36:376:498:15
6:35
+0:14
24M
24.00 mi13:08:332:43:006:486:23
6:23
-0:12
40K
24.85 mi13:14:092:48:366:475:36
6:33
+0:10
25.2M
25.20 mi13:16:382:51:056:472:29
7:12
+0:39
Finish
26.22 mi13:23:062:57:336:476:28
6:21
-0:51

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

6:21 /mi

Average Pace

6:47 /mi

Slowest Pace

7:12 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:55:04

99% of race

Time at Steady Pace

2:29

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 6:46 /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 mi10:46:4321:106:4921:10
6:49
#6427
10K
6.21 mi11:07:5242:196:4921:09
6:48
#6413
15K
9.32 mi11:29:091:03:366:4921:17
6:51
#6444
20K
12.43 mi11:50:381:25:056:5121:29
6:55
#6375
Half
13.11 mi11:55:211:29:486:514:43
6:55
#6420
25K
15.53 mi12:12:021:46:296:5116:41
6:53
#6204
30K
18.64 mi12:33:052:07:326:5021:03
6:47
#5522
20M
20.00 mi12:42:152:16:426:509:10
6:45
#5227
21M
21.00 mi12:49:102:23:376:506:55
6:55
#4943
35K
21.75 mi12:53:552:28:226:494:45
6:21
#4731
23M
23.00 mi13:02:102:36:376:498:15
6:35
#4454
24M
24.00 mi13:08:332:43:006:486:23
6:23
#4239
40K
24.85 mi13:14:092:48:366:475:36
6:33
#4101
25.2M
25.20 mi13:16:382:51:056:472:29
7:12
#4042
Finish
26.22 mi13:23:062:57:336:476:28
6:21
#3909
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi64275555556597(Top 23%)634(Top 5%)634(Top 12%)
10K6.21 mi3.10 mi6413+14552+3552+36484(Top 23%)599(Top 5%)599(Top 11%)
15K9.32 mi3.11 mi6444-31579-27579-276597(Top 23%)634(Top 5%)634(Top 12%)
20K12.43 mi3.11 mi6375+69581-2581-26317(Top 22%)621(Top 5%)621(Top 11%)
Half13.11 mi0.68 mi6420-45593-12593-127038(Top 25%)763(Top 6%)763(Top 14%)
25K15.53 mi2.42 mi6204+216570+23570+235526(Top 19%)498(Top 4%)498(Top 9%)
30K18.64 mi3.11 mi5522+682454+116454+1163312(Top 12%)205(Top 2%)205(Top 4%)
20M20.00 mi1.36 mi5227+295421+33421+332691(Top 9%)161(Top 1%)161(Top 3%)
21M21.00 mi1.00 mi4943+284375+46375+461969(Top 7%)109(Top 0.9%)109(Top 2%)
35K21.75 mi0.75 mi4731+212353+22353+221849(Top 7%)108(Top 0.9%)108(Top 2%)
23M23.00 mi1.25 mi4454+277322+31322+311812(Top 6%)110(Top 0.9%)110(Top 2%)
24M24.00 mi1.00 mi4239+215305+17305+171629(Top 6%)105(Top 0.9%)105(Top 2%)
40K24.85 mi0.85 mi4101+138292+13292+131825(Top 6%)136(Top 1%)136(Top 2%)
25.2M25.20 mi0.35 mi4042+59291+1291+12227(Top 8%)220(Top 2%)220(Top 4%)
Finish26.22 mi1.02 mi3909+133281+10281+102107(Top 7%)170(Top 1%)170(Top 3%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 23%
×21stories
+97ft-345ft

Overall

6597

Females

634

F18-39

634

5K→10K

3.1 - 6.2 mi

Top 23%
×5stories
+79ft-138ft

Overall

6484

Females

599

F18-39

599

10K→15K

6.2 - 9.3 mi

Top 23%
×3stories
+67ft-78ft

Overall

6597

Females

634

F18-39

634

15K→20K

9.3 - 12.4 mi

Top 22%
×5stories
+106ft-86ft

Overall

6317

Females

621

F18-39

621

20K→Half

12.4 - 13.1 mi

Top 25%
×2stories
+19ft-37ft

Overall

7038

Females

763

F18-39

763

Half→25K

13.1 - 15.5 mi

Top 19%
×4stories
+66ft-88ft

Overall

5526

Females

498

F18-39

498

25K→30K

15.5 - 18.6 mi

Top 12%
×9stories
+181ft-148ft

Overall

3312

Females

205

F18-39

205

30K→20M

18.6 - 20.0 mi

Top 9%
×5stories
+64ft-50ft

Overall

2691

Females

161

F18-39

161

20M→21M

20.0 - 21.0 mi

Top 7%
×8stories
+106ft-24ft

Overall

1969

Females

109

F18-39

109

21M→35K

21.0 - 21.8 mi

Top 7%
×7stories
+17ft-86ft

Overall

1849

Females

108

F18-39

108

35K→23M

21.8 - 23.0 mi

Top 6%
×5stories
+23ft-63ft

Overall

1812

Females

110

F18-39

110

23M→24M

23.0 - 24.0 mi

Top 6%
×6stories
+12ft-82ft

Overall

1629

Females

105

F18-39

105

24M→40K

24.0 - 24.9 mi

Top 6%
×1story
+6ft-20ft

Overall

1825

Females

136

F18-39

136

40K→25.2M

24.9 - 25.2 mi

Top 8%
×1story
+13ft-16ft

Overall

2227

Females

220

F18-39

220

25.2M→Finish

25.2 - 26.2 mi

Top 7%
×2stories
+22ft-21ft

Overall

2107

Females

170

F18-39

170

Passing Analysis

Category:
Athletes Passed
3058
Passed By
540
Net Change
+2518
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6427
5K → 10K192178+14#6427#6413
10K → 15K143174-31#6413#6444
15K → 20K15990+69#6444#6375
20K → Half1055-45#6375#6420
Half → 25K24428+216#6420#6204
25K → 30K6831+682#6204#5522
30K → 20M2950+295#5522#5227
20M → 21M2851+284#5227#4943
21M → 35K2120+212#4943#4731
35K → 23M2770+277#4731#4454
23M → 24M2150+215#4454#4239
24M → 40K1391+138#4239#4101
40K → 25.2M601+59#4101#4042
25.2M → Finish14411+133#4042#3909
TOTALS3058540+2518
📊

Passing Visuals

Category:
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🔥Passing Intensity

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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