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BOSTON MARATHON 2025

Janine Zajac

Bib: 17222•F

MB

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 26%
Gender (Female)
#0 / 12228
Top 9%
Division (F18-39)
#0 / 5469
Top 17%
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
7:26/mi
23:06
↑ 97↓ 3451.5%
10K· 6.21 mi
7:25/mi
46:07
↑ 79↓ 1380.4%
15K· 9.32 mi
7:29/mi
1:09:22
↑ 67↓ 78
20K· 12.43 mi
7:26/mi
1:32:27
↑ 106↓ 860.1%
Half· 13.11 mi
7:18/mi
1:37:26
↑ 19↓ 370.5%
25K· 15.53 mi
7:17/mi
1:55:05
↑ 66↓ 880.2%
30K· 18.64 mi
7:14/mi
2:17:32
↑ 181↓ 1480.2%
20M
7:06/mi
2:27:11
↑ 64↓ 500.2%
21M
7:23/mi
2:34:34
↑ 106↓ 241.6%
35K· 21.75 mi
6:52/mi
2:39:42
↑ 17↓ 861.7%
23M
7:07/mi
2:48:37
↑ 23↓ 630.6%
24M
7:00/mi
2:55:37
↓ 821.3%
40K· 24.85 mi
7:07/mi
3:01:42
↓ 200.3%
25.2M
7:41/mi
3:04:21
↑ 13↓ 160.2%
Finish· 26.22 mi
6:34/mi
3:11:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:37:26
Pace7:26 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:33:37
Pace7:08 /mi
📊Negative Split: 3.9% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:13:2423:067:2623:06
7:26
-
10K
6.21 mi11:36:2546:077:2523:01
7:25
-0:01
15K
9.32 mi11:59:401:09:227:2723:15
7:29
+0:04
20K
12.43 mi12:22:451:32:277:2623:05
7:26
-0:03
Half
13.11 mi12:27:441:37:267:264:59
7:18
-0:08
25K
15.53 mi12:45:231:55:057:2517:39
7:17
-0:01
30K
18.64 mi13:07:502:17:327:2322:27
7:14
-0:03
20M
20.00 mi13:17:292:27:117:229:39
7:06
-0:08
21M
21.00 mi13:24:522:34:347:227:23
7:23
+0:17
35K
21.75 mi13:30:002:39:427:215:08
6:52
-0:31
23M
23.00 mi13:38:552:48:377:208:55
7:07
+0:15
24M
24.00 mi13:45:552:55:377:197:00
7:00
-0:07
40K
24.85 mi13:52:003:01:427:196:05
7:07
+0:07
25.2M
25.20 mi13:54:393:04:217:192:39
7:41
+0:34
Finish
26.22 mi14:01:213:11:037:186:42
6:34
-1:07

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

6:34 /mi

Average Pace

7:18 /mi

Slowest Pace

7:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

43:29

23% of race

Time at Steady Pace

2:27:34

77% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:17 /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 mi11:13:2423:067:2623:06
7:26
#11661
10K
6.21 mi11:36:2546:077:2523:01
7:25
#11434
15K
9.32 mi11:59:401:09:227:2723:15
7:29
#11471
20K
12.43 mi12:22:451:32:277:2623:05
7:26
#11113
Half
13.11 mi12:27:441:37:267:264:59
7:18
#11049
25K
15.53 mi12:45:231:55:057:2517:39
7:17
#10529
30K
18.64 mi13:07:502:17:327:2322:27
7:14
#9511
20M
20.00 mi13:17:292:27:117:229:39
7:06
#9041
21M
21.00 mi13:24:522:34:347:227:23
7:23
#8639
35K
21.75 mi13:30:002:39:427:215:08
6:52
#8415
23M
23.00 mi13:38:552:48:377:208:55
7:07
#8072
24M
24.00 mi13:45:552:55:377:197:00
7:00
#7857
40K
24.85 mi13:52:003:01:427:196:05
7:07
#7669
25.2M
25.20 mi13:54:393:04:217:192:39
7:41
#7585
Finish
26.22 mi14:01:213:11:037:186:42
6:34
#7343
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi116612607260711623(Top 41%)2692(Top 22%)2692(Top 49%)
10K6.21 mi3.10 mi11434+2272516+912516+9111261(Top 40%)2440(Top 20%)2440(Top 45%)
15K9.32 mi3.11 mi11471-372566-502566-5011623(Top 41%)2692(Top 22%)2692(Top 49%)
20K12.43 mi3.11 mi11113+3582403+1632403+16310160(Top 36%)2027(Top 17%)2027(Top 37%)
Half13.11 mi0.68 mi11049+642366+372366+3710046(Top 35%)1952(Top 16%)1952(Top 36%)
25K15.53 mi2.42 mi10529+5202145+2212145+2218216(Top 29%)1296(Top 11%)1296(Top 24%)
30K18.64 mi3.11 mi9511+10181730+4151730+4156055(Top 21%)696(Top 6%)696(Top 13%)
20M20.00 mi1.36 mi9041+4701554+1761554+1764708(Top 17%)446(Top 4%)446(Top 8%)
21M21.00 mi1.00 mi8639+4021426+1281426+1284072(Top 14%)387(Top 3%)387(Top 7%)
35K21.75 mi0.75 mi8415+2241361+651361+654551(Top 16%)507(Top 4%)507(Top 9%)
23M23.00 mi1.25 mi8072+3431272+891272+894487(Top 16%)534(Top 4%)534(Top 10%)
24M24.00 mi1.00 mi7857+2151228+441228+444674(Top 16%)635(Top 5%)635(Top 12%)
40K24.85 mi0.85 mi7669+1881189+391189+394613(Top 16%)677(Top 6%)677(Top 12%)
25.2M25.20 mi0.35 mi7585+841173+161173+164357(Top 15%)679(Top 6%)679(Top 12%)
Finish26.22 mi1.02 mi7343+2421107+661107+663243(Top 11%)376(Top 3%)376(Top 7%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 41%
×21story building
+97ft-345ft

Overall

11623

Females

2692

F18-39

2692

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

11261

Females

2440

F18-39

2440

10K→15K

6.2 - 9.3 mi

Top 41%
×3story building
+67ft-78ft

Overall

11623

Females

2692

F18-39

2692

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

10160

Females

2027

F18-39

2027

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

10046

Females

1952

F18-39

1952

Half→25K

13.1 - 15.5 mi

Top 29%
×4story building
+66ft-88ft

Overall

8216

Females

1296

F18-39

1296

25K→30K

15.5 - 18.6 mi

Top 21%
×9story building
+181ft-148ft

Overall

6055

Females

696

F18-39

696

30K→20M

18.6 - 20.0 mi

Top 17%
×5story building
+64ft-50ft

Overall

4708

Females

446

F18-39

446

20M→21M

20.0 - 21.0 mi

Top 14%
×8story building
+106ft-24ft

Overall

4072

Females

387

F18-39

387

21M→35K

21.0 - 21.8 mi

Top 16%
×7story building
+17ft-86ft

Overall

4551

Females

507

F18-39

507

35K→23M

21.8 - 23.0 mi

Top 16%
×5story building
+23ft-63ft

Overall

4487

Females

534

F18-39

534

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4674

Females

635

F18-39

635

24M→40K

24.0 - 24.9 mi

Top 16%
×1story
+6ft-20ft

Overall

4613

Females

677

F18-39

677

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4357

Females

679

F18-39

679

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2story building
+22ft-21ft

Overall

3243

Females

376

F18-39

376

Passing Analysis

Category:
Athletes Passed
4737*
Passed By
419
Net Change
+4318
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11661
5K → 10K379152+227#11661#11434
10K → 15K167204-37#11434#11471
15K → 20K39133+358#11471#11113
20K → Half8117+64#11113#11049
Half → 25K5233+520#11049#10529
25K → 30K1018*0+1018#10529#9511
30K → 20M4700+470#9511#9041
20M → 21M4020+402#9041#8639
21M → 35K2251+224#8639#8415
35K → 23M3452+343#8415#8072
23M → 24M2183+215#8072#7857
24M → 40K1902+188#7857#7669
40K → 25.2M862+84#7669#7585
25.2M → Finish2420+242#7585#7343
TOTALS4737*419+4318

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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