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BOSTON MARATHON 2025

Anna Hertz

Bib: 13171•F

IA

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 20%
Division (F18-39)
#0 / 5469
Top 34%
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
7:21/mi
22:49
↑ 97↓ 3451.5%
10K· 6.21 mi
7:25/mi
45:53
↑ 79↓ 1380.4%
15K· 9.32 mi
7:23/mi
1:08:49
↑ 67↓ 78
20K· 12.43 mi
7:26/mi
1:31:56
↑ 106↓ 860.1%
Half· 13.11 mi
7:20/mi
1:36:56
↑ 19↓ 370.5%
25K· 15.53 mi
7:18/mi
1:54:38
↑ 66↓ 880.2%
30K· 18.64 mi
7:39/mi
2:18:23
↑ 181↓ 1480.2%
20M
8:01/mi
2:29:16
↑ 64↓ 500.2%
21M
8:45/mi
2:38:01
↑ 106↓ 241.6%
35K· 21.75 mi
8:39/mi
2:44:29
↑ 17↓ 861.7%
23M
8:52/mi
2:55:35
↑ 23↓ 630.6%
24M
8:13/mi
3:03:48
↓ 821.3%
40K· 24.85 mi
7:55/mi
3:10:34
↓ 200.3%
25.2M
8:36/mi
3:13:32
↑ 13↓ 160.2%
Finish· 26.22 mi
6:58/mi
3:20:38
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:56
Pace7:24 /mi
2nd Half
Distance13.11 mi
Time1:43:42
Pace7:55 /mi
📊Positive Split: 7.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:0522:497:2122:49
7:21
-
10K
6.21 mi11:17:0945:537:2323:04
7:25
+0:04
15K
9.32 mi11:40:051:08:497:2322:56
7:23
-0:02
20K
12.43 mi12:03:121:31:567:2423:07
7:26
+0:03
Half
13.11 mi12:08:121:36:567:245:00
7:20
-0:06
25K
15.53 mi12:25:541:54:387:2317:42
7:18
-0:02
30K
18.64 mi12:49:392:18:237:2523:45
7:39
+0:21
20M
20.00 mi13:00:322:29:167:2810:53
8:01
+0:22
21M
21.00 mi13:09:172:38:017:318:45
8:45
+0:44
35K
21.75 mi13:15:452:44:297:346:28
8:39
-0:06
23M
23.00 mi13:26:512:55:357:3811:06
8:52
+0:13
24M
24.00 mi13:35:043:03:487:408:13
8:13
-0:39
40K
24.85 mi13:41:503:10:347:406:46
7:55
-0:18
25.2M
25.20 mi13:44:483:13:327:412:58
8:36
+0:41
Finish
26.22 mi13:51:543:20:387:397:06
6:58
-1:38

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

6:58 /mi

Average Pace

7:39 /mi

Slowest Pace

8:52 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

29:48

15% of race

Time at Steady Pace

2:02:27

61% of race

Time at Slower Pace

48:23

24% of race

Average Pace: 7:39 /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 mi10:54:0522:497:2122:49
7:21
#10818
10K
6.21 mi11:17:0945:537:2323:04
7:25
#11103
15K
9.32 mi11:40:051:08:497:2322:56
7:23
#10911
20K
12.43 mi12:03:121:31:567:2423:07
7:26
#10748
Half
13.11 mi12:08:121:36:567:245:00
7:20
#10708
25K
15.53 mi12:25:541:54:387:2317:42
7:18
#10268
30K
18.64 mi12:49:392:18:237:2523:45
7:39
#9909
20M
20.00 mi13:00:322:29:167:2810:53
8:01
#9901
21M
21.00 mi13:09:172:38:017:318:45
8:45
#10038
35K
21.75 mi13:15:452:44:297:346:28
8:39
#10310
23M
23.00 mi13:26:512:55:357:3811:06
8:52
#10622
24M
24.00 mi13:35:043:03:487:408:13
8:13
#10686
40K
24.85 mi13:41:503:10:347:406:46
7:55
#10615
25.2M
25.20 mi13:44:483:13:327:412:58
8:36
#10570
Finish
26.22 mi13:51:543:20:387:397:06
6:58
#10327
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi108182196219610711(Top 38%)2226(Top 18%)2226(Top 41%)
10K6.21 mi3.10 mi11103-2852348-1522348-15211419(Top 40%)2520(Top 21%)2520(Top 46%)
15K9.32 mi3.11 mi10911+1922275+732275+7310711(Top 38%)2226(Top 18%)2226(Top 41%)
20K12.43 mi3.11 mi10748+1632215+602215+6010266(Top 36%)2093(Top 17%)2093(Top 38%)
Half13.11 mi0.68 mi10708+402200+152200+1510348(Top 36%)2128(Top 17%)2128(Top 39%)
25K15.53 mi2.42 mi10268+4402034+1662034+1668388(Top 30%)1380(Top 11%)1380(Top 25%)
30K18.64 mi3.11 mi9909+3591912+1221912+1228801(Top 31%)1748(Top 14%)1748(Top 32%)
20M20.00 mi1.36 mi9901+81940-281940-2810522(Top 37%)2696(Top 22%)2696(Top 49%)
21M21.00 mi1.00 mi10038-1372051-1112051-11111986(Top 42%)3579(Top 29%)3579(Top 65%)
35K21.75 mi0.75 mi10310-2722218-1672218-16716331(Top 57%)5951(Top 49%)5951(Top 109%)
23M23.00 mi1.25 mi10622-3122411-1932411-19315481(Top 55%)5583(Top 46%)5583(Top 102%)
24M24.00 mi1.00 mi10686-642492-812492-8112688(Top 45%)4143(Top 34%)4143(Top 76%)
40K24.85 mi0.85 mi10615+712475+172475+179597(Top 34%)2722(Top 22%)2722(Top 50%)
25.2M25.20 mi0.35 mi10570+452470+52470+59480(Top 33%)2757(Top 23%)2757(Top 50%)
Finish26.22 mi1.02 mi10327+2432389+812389+815567(Top 20%)1096(Top 9%)1096(Top 20%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10711

Females

2226

F18-39

2226

5K→10K

3.1 - 6.2 mi

Top 40%
×5story building
+79ft-138ft

Overall

11419

Females

2520

F18-39

2520

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10711

Females

2226

F18-39

2226

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

10266

Females

2093

F18-39

2093

20K→Half

12.4 - 13.1 mi

Top 36%
×2story building
+19ft-37ft

Overall

10348

Females

2128

F18-39

2128

Half→25K

13.1 - 15.5 mi

Top 30%
×4story building
+66ft-88ft

Overall

8388

Females

1380

F18-39

1380

25K→30K

15.5 - 18.6 mi

Top 31%
×9story building
+181ft-148ft

Overall

8801

Females

1748

F18-39

1748

30K→20M

18.6 - 20.0 mi

Top 37%
×5story building
+64ft-50ft

Overall

10522

Females

2696

F18-39

2696

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11986

Females

3579

F18-39

3579

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

16331

Females

5951

F18-39

5951

35K→23M

21.8 - 23.0 mi

Top 55%
×5story building
+23ft-63ft

Overall

15481

Females

5583

F18-39

5583

23M→24M

23.0 - 24.0 mi

Top 45%
×6story building
+12ft-82ft

Overall

12688

Females

4143

F18-39

4143

24M→40K

24.0 - 24.9 mi

Top 34%
×1story
+6ft-20ft

Overall

9597

Females

2722

F18-39

2722

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9480

Females

2757

F18-39

2757

25.2M→Finish

25.2 - 26.2 mi

Top 20%
×2story building
+22ft-21ft

Overall

5567

Females

1096

F18-39

1096

Passing Analysis

Category:
Athletes Passed
2316*
Passed By
1821
Net Change
+491
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10818
5K → 10K155440-285#10818#11103
10K → 15K27583+192#11103#10911
15K → 20K24784+163#10911#10748
20K → Half5414+40#10748#10708
Half → 25K4477+440#10708#10268
25K → 30K424*65+359#10268#9909
30K → 20M116107+8#9909#9901
20M → 21M65200-137#9901#10038
21M → 35K18289-272#10038#10310
35K → 23M43355-312#10310#10622
23M → 24M58122-64#10622#10686
24M → 40K9827+71#10686#10615
40K → 25.2M6520+45#10615#10570
25.2M → Finish2518+243#10570#10327
TOTALS2316*1821+491

* 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