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BOSTON MARATHON 2025

Britt Kelly

Bib: 15383•F

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 47%
Gender (Female)
#0 / 12228
Top 32%
Masters (Masters Women)
#0 / 6759
Top 17%
Division (F40-44)
#0 / 1718
Top 36%
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
7:45/mi
24:05
↑ 97↓ 3451.5%
10K· 6.21 mi
7:51/mi
48:28
↑ 79↓ 1380.4%
15K· 9.32 mi
7:50/mi
1:12:49
↑ 67↓ 78
20K· 12.43 mi
7:55/mi
1:37:24
↑ 106↓ 860.1%
Half· 13.11 mi
7:48/mi
1:42:43
↑ 19↓ 370.5%
25K· 15.53 mi
7:56/mi
2:01:56
↑ 66↓ 880.2%
30K· 18.64 mi
8:12/mi
2:27:25
↑ 181↓ 1480.2%
20M
8:20/mi
2:38:44
↑ 64↓ 500.2%
21M
9:16/mi
2:48:00
↑ 106↓ 241.6%
35K· 21.75 mi
8:03/mi
2:54:01
↑ 17↓ 861.7%
23M
8:13/mi
3:04:18
↑ 23↓ 630.6%
24M
8:00/mi
3:12:18
↓ 821.3%
40K· 24.85 mi
8:12/mi
3:19:19
↓ 200.3%
25.2M
8:56/mi
3:22:24
↑ 13↓ 160.2%
Finish· 26.22 mi
7:47/mi
3:30:20
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:43
Pace7:50 /mi
2nd Half
Distance13.11 mi
Time1:47:37
Pace8:13 /mi
📊Positive Split: 4.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:5124:057:4524:05
7:45
-
10K
6.21 mi11:20:1448:287:4824:23
7:51
+0:06
15K
9.32 mi11:44:351:12:497:4924:21
7:50
-0:01
20K
12.43 mi12:09:101:37:247:5024:35
7:55
+0:05
Half
13.11 mi12:14:291:42:437:505:19
7:48
-0:07
25K
15.53 mi12:33:422:01:567:5119:13
7:56
+0:08
30K
18.64 mi12:59:112:27:257:5425:29
8:12
+0:16
20M
20.00 mi13:10:302:38:447:5611:19
8:20
+0:08
21M
21.00 mi13:19:462:48:008:009:16
9:16
+0:56
35K
21.75 mi13:25:472:54:018:006:01
8:03
-1:13
23M
23.00 mi13:36:043:04:188:0110:17
8:13
+0:10
24M
24.00 mi13:44:043:12:188:018:00
8:00
-0:13
40K
24.85 mi13:51:053:19:198:017:01
8:12
+0:12
25.2M
25.20 mi13:54:103:22:248:023:05
8:56
+0:44
Finish
26.22 mi14:02:063:30:208:027:56
7:47
-1:09

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

7:45 /mi

Average Pace

8:02 /mi

Slowest Pace

9:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:17:59

94% of race

Time at Steady Pace

3:05

1% of race

Time at Slower Pace

9:16

4% of race

Average Pace: 8:01 /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 mi10:55:5124:057:4524:05
7:45
#14406
10K
6.21 mi11:20:1448:287:4824:23
7:51
#14795
15K
9.32 mi11:44:351:12:497:4924:21
7:50
#14743
20K
12.43 mi12:09:101:37:247:5024:35
7:55
#14565
Half
13.11 mi12:14:291:42:437:505:19
7:48
#14538
25K
15.53 mi12:33:422:01:567:5119:13
7:56
#14308
30K
18.64 mi12:59:112:27:257:5425:29
8:12
#13946
20M
20.00 mi13:10:302:38:447:5611:19
8:20
#13800
21M
21.00 mi13:19:462:48:008:009:16
9:16
#13857
35K
21.75 mi13:25:472:54:018:006:01
8:03
#13787
23M
23.00 mi13:36:043:04:188:0110:17
8:13
#13615
24M
24.00 mi13:44:043:12:188:018:00
8:00
#13492
40K
24.85 mi13:51:053:19:198:017:01
8:12
#13400
25.2M
25.20 mi13:54:103:22:248:023:05
8:56
#13356
Finish
26.22 mi14:02:063:30:208:027:56
7:47
#13300
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi144064161416114705(Top 52%)4419(Top 36%)4419(Top 257%)
10K6.21 mi3.10 mi14795-3894428-2674428-26715252(Top 54%)4689(Top 38%)4689(Top 273%)
15K9.32 mi3.11 mi14743+524398+304398+3014705(Top 52%)4419(Top 36%)4419(Top 257%)
20K12.43 mi3.11 mi14565+1784325+734325+7314210(Top 50%)4203(Top 34%)4203(Top 245%)
Half13.11 mi0.68 mi14538+274314+114314+1114244(Top 50%)4195(Top 34%)4195(Top 244%)
25K15.53 mi2.42 mi14308+2304222+924222+9213318(Top 47%)3840(Top 31%)3840(Top 224%)
30K18.64 mi3.11 mi13946+3624072+1504072+15012851(Top 45%)3748(Top 31%)3748(Top 218%)
20M20.00 mi1.36 mi13800+1464029+434029+4312692(Top 45%)3802(Top 31%)3802(Top 221%)
21M21.00 mi1.00 mi13857-574088-594088-5914969(Top 53%)5152(Top 42%)5152(Top 300%)
35K21.75 mi0.75 mi13787+704072+164072+1612575(Top 44%)3938(Top 32%)3938(Top 229%)
23M23.00 mi1.25 mi13615+1724022+504022+5011467(Top 40%)3470(Top 28%)3470(Top 202%)
24M24.00 mi1.00 mi13492+1233970+523970+5211280(Top 40%)3460(Top 28%)3460(Top 201%)
40K24.85 mi0.85 mi13400+923943+273943+2711625(Top 41%)3717(Top 30%)3717(Top 216%)
25.2M25.20 mi0.35 mi13356+443930+133930+1311538(Top 41%)3775(Top 31%)3775(Top 220%)
Finish26.22 mi1.02 mi13300+563923+73923+711363(Top 40%)3649(Top 30%)3649(Top 212%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 52%
×21story building
+97ft-345ft

Overall

14705

Females

4419

F40-44

4419

5K→10K

3.1 - 6.2 mi

Top 54%
×5story building
+79ft-138ft

Overall

15252

Females

4689

F40-44

4689

10K→15K

6.2 - 9.3 mi

Top 52%
×3story building
+67ft-78ft

Overall

14705

Females

4419

F40-44

4419

15K→20K

9.3 - 12.4 mi

Top 50%
×5story building
+106ft-86ft

Overall

14210

Females

4203

F40-44

4203

20K→Half

12.4 - 13.1 mi

Top 50%
×2story building
+19ft-37ft

Overall

14244

Females

4195

F40-44

4195

Half→25K

13.1 - 15.5 mi

Top 47%
×4story building
+66ft-88ft

Overall

13318

Females

3840

F40-44

3840

25K→30K

15.5 - 18.6 mi

Top 45%
×9story building
+181ft-148ft

Overall

12851

Females

3748

F40-44

3748

30K→20M

18.6 - 20.0 mi

Top 45%
×5story building
+64ft-50ft

Overall

12692

Females

3802

F40-44

3802

20M→21M

20.0 - 21.0 mi

Top 53%
×8story building
+106ft-24ft

Overall

14969

Females

5152

F40-44

5152

21M→35K

21.0 - 21.8 mi

Top 44%
×7story building
+17ft-86ft

Overall

12575

Females

3938

F40-44

3938

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

11467

Females

3470

F40-44

3470

23M→24M

23.0 - 24.0 mi

Top 40%
×6story building
+12ft-82ft

Overall

11280

Females

3460

F40-44

3460

24M→40K

24.0 - 24.9 mi

Top 41%
×1story
+6ft-20ft

Overall

11625

Females

3717

F40-44

3717

40K→25.2M

24.9 - 25.2 mi

Top 41%
×1story
+13ft-16ft

Overall

11538

Females

3775

F40-44

3775

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2story building
+22ft-21ft

Overall

11363

Females

3649

F40-44

3649

Passing Analysis

Category:
Athletes Passed
2405
Passed By
1299
Net Change
+1106
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14406
5K → 10K158547-389#14406#14795
10K → 15K213161+52#14795#14743
15K → 20K280102+178#14743#14565
20K → Half5427+27#14565#14538
Half → 25K28353+230#14538#14308
25K → 30K44482+362#14308#13946
30K → 20M19044+146#13946#13800
20M → 21M81138-57#13800#13857
21M → 35K9323+70#13857#13787
35K → 23M20028+172#13787#13615
23M → 24M14320+123#13615#13492
24M → 40K11725+92#13492#13400
40K → 25.2M6016+44#13400#13356
25.2M → Finish8933+56#13356#13300
TOTALS24051299+1106
📊

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