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BOSTON MARATHON 2025

Brittany Sarza

Bib: 15756•F

CT

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 40%
Gender (Female)
#0 / 12228
Top 24%
Division (F18-39)
#0 / 5469
Top 41%
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
7:28/mi
23:12
↑ 97↓ 3451.5%
10K· 6.21 mi
7:28/mi
46:25
↑ 79↓ 1380.4%
15K· 9.32 mi
7:26/mi
1:09:31
↑ 67↓ 78
20K· 12.43 mi
7:29/mi
1:32:45
↑ 106↓ 860.1%
Half· 13.11 mi
7:27/mi
1:37:50
↑ 19↓ 370.5%
25K· 15.53 mi
7:30/mi
1:56:02
↑ 66↓ 880.2%
30K· 18.64 mi
8:01/mi
2:20:56
↑ 181↓ 1480.2%
20M
8:28/mi
2:32:26
↑ 64↓ 500.2%
21M
9:10/mi
2:41:36
↑ 106↓ 241.6%
35K· 21.75 mi
7:48/mi
2:47:26
↑ 17↓ 861.7%
23M
8:19/mi
2:57:51
↑ 23↓ 630.6%
24M
8:05/mi
3:05:56
↓ 821.3%
40K· 24.85 mi
8:22/mi
3:13:05
↓ 200.3%
25.2M
9:08/mi
3:16:14
↑ 13↓ 160.2%
Finish· 26.22 mi
7:44/mi
3:24:07
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:37:50
Pace7:28 /mi
2nd Half
Distance13.11 mi
Time1:46:17
Pace8:06 /mi
📊Positive Split: 8.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:55:2823:127:2823:12
7:28
-
10K
6.21 mi11:18:4146:257:2823:13
7:28
0:00
15K
9.32 mi11:41:471:09:317:2823:06
7:26
-0:02
20K
12.43 mi12:05:011:32:457:2823:14
7:29
+0:03
Half
13.11 mi12:10:061:37:507:285:05
7:27
-0:02
25K
15.53 mi12:28:181:56:027:2818:12
7:30
+0:03
30K
18.64 mi12:53:122:20:567:3424:54
8:01
+0:31
20M
20.00 mi13:04:422:32:267:3711:30
8:28
+0:27
21M
21.00 mi13:13:522:41:367:429:10
9:10
+0:42
35K
21.75 mi13:19:422:47:267:425:50
7:48
-1:22
23M
23.00 mi13:30:072:57:517:4410:25
8:19
+0:31
24M
24.00 mi13:38:123:05:567:458:05
8:05
-0:14
40K
24.85 mi13:45:213:13:057:467:09
8:22
+0:17
25.2M
25.20 mi13:48:303:16:147:473:09
9:08
+0:46
Finish
26.22 mi13:56:233:24:077:477:53
7:44
-1:24

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

7:26 /mi

Average Pace

7:47 /mi

Slowest Pace

9:10 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:56:02

57% of race

Time at Steady Pace

46:42

23% of race

Time at Slower Pace

41:23

20% of race

Average Pace: 7:47 /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 mi10:55:2823:127:2823:12
7:28
#11968
10K
6.21 mi11:18:4146:257:2823:13
7:28
#11870
15K
9.32 mi11:41:471:09:317:2823:06
7:26
#11611
20K
12.43 mi12:05:011:32:457:2823:14
7:29
#11349
Half
13.11 mi12:10:061:37:507:285:05
7:27
#11344
25K
15.53 mi12:28:181:56:027:2818:12
7:30
#11077
30K
18.64 mi12:53:122:20:567:3424:54
8:01
#11118
20M
20.00 mi13:04:422:32:267:3711:30
8:28
#11266
21M
21.00 mi13:13:522:41:367:429:10
9:10
#11428
35K
21.75 mi13:19:422:47:267:425:50
7:48
#11386
23M
23.00 mi13:30:072:57:517:4410:25
8:19
#11415
24M
24.00 mi13:38:123:05:567:458:05
8:05
#11389
40K
24.85 mi13:45:213:13:057:467:09
8:22
#11426
25.2M
25.20 mi13:48:303:16:147:473:09
9:08
#11431
Finish
26.22 mi13:56:233:24:077:477:53
7:44
#11374
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi119682781278111208(Top 39%)2481(Top 20%)2481(Top 45%)
10K6.21 mi3.10 mi11870+982738+432738+4311857(Top 42%)2740(Top 22%)2740(Top 50%)
15K9.32 mi3.11 mi11611+2592627+1112627+11111208(Top 39%)2481(Top 20%)2481(Top 45%)
20K12.43 mi3.11 mi11349+2622527+1002527+10010593(Top 37%)2261(Top 18%)2261(Top 41%)
Half13.11 mi0.68 mi11344+52524+32524+311393(Top 40%)2638(Top 22%)2638(Top 48%)
25K15.53 mi2.42 mi11077+2672430+942430+9410050(Top 35%)2126(Top 17%)2126(Top 39%)
30K18.64 mi3.11 mi11118-412527-972527-9711495(Top 40%)3031(Top 25%)3031(Top 55%)
20M20.00 mi1.36 mi11266-1482646-1192646-11913547(Top 48%)4264(Top 35%)4264(Top 78%)
21M21.00 mi1.00 mi11428-1622776-1302776-13014440(Top 51%)4852(Top 40%)4852(Top 89%)
35K21.75 mi0.75 mi11386+422781-52781-510843(Top 38%)3026(Top 25%)3026(Top 55%)
23M23.00 mi1.25 mi11415-292840-592840-5912163(Top 43%)3820(Top 31%)3820(Top 70%)
24M24.00 mi1.00 mi11389+262855-152855-1511809(Top 42%)3704(Top 30%)3704(Top 68%)
40K24.85 mi0.85 mi11426-372920-652920-6512552(Top 44%)4205(Top 34%)4205(Top 77%)
25.2M25.20 mi0.35 mi11431-52935-152935-1512582(Top 44%)4261(Top 35%)4261(Top 78%)
Finish26.22 mi1.02 mi11374+572941-62941-610980(Top 39%)3448(Top 28%)3448(Top 63%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 39%
×21story building
+97ft-345ft

Overall

11208

Females

2481

F18-39

2481

5K→10K

3.1 - 6.2 mi

Top 42%
×5story building
+79ft-138ft

Overall

11857

Females

2740

F18-39

2740

10K→15K

6.2 - 9.3 mi

Top 39%
×3story building
+67ft-78ft

Overall

11208

Females

2481

F18-39

2481

15K→20K

9.3 - 12.4 mi

Top 37%
×5story building
+106ft-86ft

Overall

10593

Females

2261

F18-39

2261

20K→Half

12.4 - 13.1 mi

Top 40%
×2story building
+19ft-37ft

Overall

11393

Females

2638

F18-39

2638

Half→25K

13.1 - 15.5 mi

Top 35%
×4story building
+66ft-88ft

Overall

10050

Females

2126

F18-39

2126

25K→30K

15.5 - 18.6 mi

Top 40%
×9story building
+181ft-148ft

Overall

11495

Females

3031

F18-39

3031

30K→20M

18.6 - 20.0 mi

Top 48%
×5story building
+64ft-50ft

Overall

13547

Females

4264

F18-39

4264

20M→21M

20.0 - 21.0 mi

Top 51%
×8story building
+106ft-24ft

Overall

14440

Females

4852

F18-39

4852

21M→35K

21.0 - 21.8 mi

Top 38%
×7story building
+17ft-86ft

Overall

10843

Females

3026

F18-39

3026

35K→23M

21.8 - 23.0 mi

Top 43%
×5story building
+23ft-63ft

Overall

12163

Females

3820

F18-39

3820

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

11809

Females

3704

F18-39

3704

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12552

Females

4205

F18-39

4205

40K→25.2M

24.9 - 25.2 mi

Top 44%
×1story
+13ft-16ft

Overall

12582

Females

4261

F18-39

4261

25.2M→Finish

25.2 - 26.2 mi

Top 39%
×2story building
+22ft-21ft

Overall

10980

Females

3448

F18-39

3448

Passing Analysis

Category:
Athletes Passed
2138
Passed By
1544
Net Change
+594
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11968
5K → 10K311213+98#11968#11870
10K → 15K32970+259#11870#11611
15K → 20K32361+262#11611#11349
20K → Half3530+5#11349#11344
Half → 25K30538+267#11344#11077
25K → 30K216257-41#11077#11118
30K → 20M76224-148#11118#11266
20M → 21M49211-162#11266#11428
21M → 35K8442+42#11428#11386
35K → 23M103132-29#11386#11415
23M → 24M9468+26#11415#11389
24M → 40K67104-37#11389#11426
40K → 25.2M3641-5#11426#11431
25.2M → Finish11053+57#11431#11374
TOTALS21381544+594
📊

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