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BOSTON MARATHON 2025

Heather Baltzer

Bib: 21163•F

ON

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 18%
Division (F45-49)
#0 / 1813
Top 20%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
24:21
Rank: #15158
Start → 5K
24:21 | 7:50/mi
10K· 6.21 mi
48:44
Rank: #15183 (-25)
5K → 10K
24:23 | 7:51/mi
15K· 9.32 mi
1:13:23
Rank: #15276 (-93)
10K → 15K
24:39 | 7:56/mi
20K· 12.43 mi
1:38:02
Rank: #14987 (+289)
15K → 20K
24:39 | 7:56/mi
Half· 13.11 mi
1:43:22
Rank: #14963 (+24)
20K → Half
5:20 | 7:49/mi
25K· 15.53 mi
2:02:57
Rank: #14856 (+107)
Half → 25K
19:35 | 8:05/mi
30K· 18.64 mi
2:28:38
Rank: #14478 (+378)
25K → 30K
25:41 | 8:16/mi
20M
2:40:05
Rank: #14357 (+121)
30K → 20M
11:27 | 8:25/mi
21M
2:48:30
Rank: #14033 (+324)
20M → 21M
8:25 | 8:25/mi
35K· 21.75 mi
2:54:23
Rank: #13915 (+118)
21M → 35K
5:53 | 7:52/mi
23M
3:04:31
Rank: #13687 (+228)
35K → 23M
10:08 | 8:06/mi
24M
3:12:37
Rank: #13600 (+87)
23M → 24M
8:06 | 8:06/mi
40K· 24.85 mi
3:19:32
Rank: #13470 (+130)
24M → 40K
6:55 | 8:06/mi
25.2M
3:22:20
Rank: #13330 (+140)
40K → 25.2M
2:48 | 8:06/mi
Finish· 26.22 mi
3:30:35
Rank: #13361 (-31)
25.2M → Finish
8:15 | 8:06/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:43:22
Pace7:53 /mi
2nd Half
Distance13.11 mi
Time1:47:13
Pace8:11 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:5724:217:5024:21
7:50
-
10K
6.21 mi11:42:2048:447:5124:23
7:51
+0:01
15K
9.32 mi12:06:591:13:237:5224:39
7:56
+0:05
20K
12.43 mi12:31:381:38:027:5324:39
7:56
0:00
Half
13.11 mi12:36:581:43:227:535:20
7:49
-0:07
25K
15.53 mi12:56:332:02:577:5519:35
8:05
+0:16
30K
18.64 mi13:22:142:28:387:5825:41
8:16
+0:11
20M
20.00 mi13:33:412:40:058:0011:27
8:25
+0:09
21M
21.00 mi13:42:062:48:308:018:25
8:25
0:00
35K
21.75 mi13:47:592:54:238:015:53
7:52
-0:33
23M
23.00 mi13:58:073:04:318:0110:08
8:06
+0:14
24M
24.00 mi14:06:133:12:378:028:06
8:06
0:00
40K
24.85 mi14:13:083:19:328:026:55
8:06
0:00
25.2M
25.20 mi14:15:563:22:208:022:48
8:06
0:00
Finish
26.22 mi14:24:113:30:358:028:15
8:06
0:00

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

7:49 /mi

Average Pace

8:02 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:45:02

78% of race

Time at Steady Pace

45:33

22% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:02 /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 mi11:17:5724:217:5024:21
7:50
#15158
10K
6.21 mi11:42:2048:447:5124:23
7:51
#15183
15K
9.32 mi12:06:591:13:237:5224:39
7:56
#15276
20K
12.43 mi12:31:381:38:027:5324:39
7:56
#14987
Half
13.11 mi12:36:581:43:227:535:20
7:49
#14963
25K
15.53 mi12:56:332:02:577:5519:35
8:05
#14856
30K
18.64 mi13:22:142:28:387:5825:41
8:16
#14478
20M
20.00 mi13:33:412:40:058:0011:27
8:25
#14357
21M
21.00 mi13:42:062:48:308:018:25
8:25
#14033
35K
21.75 mi13:47:592:54:238:015:53
7:52
#13915
23M
23.00 mi13:58:073:04:318:0110:08
8:06
#13687
24M
24.00 mi14:06:133:12:378:028:06
8:06
#13600
40K
24.85 mi14:13:083:19:328:026:55
8:06
#13470
25.2M
25.20 mi14:15:563:22:208:022:48
8:06
#13330
Finish
26.22 mi14:24:113:30:358:028:15
8:06
#13361
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi151584628462815523(Top 55%)4868(Top 40%)4868(Top 269%)
10K6.21 mi3.10 mi15183-254651-234651-2315255(Top 54%)4692(Top 38%)4692(Top 259%)
15K9.32 mi3.11 mi15276-934721-704721-7015523(Top 55%)4868(Top 40%)4868(Top 269%)
20K12.43 mi3.11 mi14987+2894578+1434578+14314407(Top 51%)4318(Top 35%)4318(Top 238%)
Half13.11 mi0.68 mi14963+244570+84570+814443(Top 51%)4308(Top 35%)4308(Top 238%)
25K15.53 mi2.42 mi14856+1074540+304540+3014483(Top 51%)4474(Top 37%)4474(Top 247%)
30K18.64 mi3.11 mi14478+3784377+1634377+16313282(Top 47%)3992(Top 33%)3992(Top 220%)
20M20.00 mi1.36 mi14357+1214334+434334+4313280(Top 47%)4141(Top 34%)4141(Top 228%)
21M21.00 mi1.00 mi14033+3244186+1484186+1489997(Top 35%)2620(Top 21%)2620(Top 145%)
35K21.75 mi0.75 mi13915+1184138+484138+4811361(Top 40%)3313(Top 27%)3313(Top 183%)
23M23.00 mi1.25 mi13687+2284055+834055+8310749(Top 38%)3121(Top 26%)3121(Top 172%)
24M24.00 mi1.00 mi13600+874036+194036+1911849(Top 42%)3743(Top 31%)3743(Top 206%)
40K24.85 mi0.85 mi13470+1303979+573979+5710852(Top 38%)3361(Top 27%)3361(Top 185%)
25.2M25.20 mi0.35 mi13330+1403922+573922+576444(Top 23%)1447(Top 12%)1447(Top 80%)
Finish26.22 mi1.02 mi13361-313962-403962-4013615(Top 48%)4773(Top 39%)4773(Top 263%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 55%
×21stories
+97ft-345ft

Overall

15523

Females

4868

F45-49

4868

5K→10K

3.1 - 6.2 mi

Top 54%
×5stories
+79ft-138ft

Overall

15255

Females

4692

F45-49

4692

10K→15K

6.2 - 9.3 mi

Top 55%
×3stories
+67ft-78ft

Overall

15523

Females

4868

F45-49

4868

15K→20K

9.3 - 12.4 mi

Top 51%
×5stories
+106ft-86ft

Overall

14407

Females

4318

F45-49

4318

20K→Half

12.4 - 13.1 mi

Top 51%
×2stories
+19ft-37ft

Overall

14443

Females

4308

F45-49

4308

Half→25K

13.1 - 15.5 mi

Top 51%
×4stories
+66ft-88ft

Overall

14483

Females

4474

F45-49

4474

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

13282

Females

3992

F45-49

3992

30K→20M

18.6 - 20.0 mi

Top 47%
×5stories
+64ft-50ft

Overall

13280

Females

4141

F45-49

4141

20M→21M

20.0 - 21.0 mi

Top 35%
×8stories
+106ft-24ft

Overall

9997

Females

2620

F45-49

2620

21M→35K

21.0 - 21.8 mi

Top 40%
×7stories
+17ft-86ft

Overall

11361

Females

3313

F45-49

3313

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

10749

Females

3121

F45-49

3121

23M→24M

23.0 - 24.0 mi

Top 42%
×6stories
+12ft-82ft

Overall

11849

Females

3743

F45-49

3743

24M→40K

24.0 - 24.9 mi

Top 38%
×1story
+6ft-20ft

Overall

10852

Females

3361

F45-49

3361

40K→25.2M

24.9 - 25.2 mi

Top 23%
×1story
+13ft-16ft

Overall

6444

Females

1447

F45-49

1447

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2stories
+22ft-21ft

Overall

13615

Females

4773

F45-49

4773

Passing Analysis

Category:
Athletes Passed
2881
Passed By
1084
Net Change
+1797
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15158
5K → 10K274299-25#15158#15183
10K → 15K179272-93#15183#15276
15K → 20K35162+289#15276#14987
20K → Half5430+24#14987#14963
Half → 25K220113+107#14963#14856
25K → 30K45072+378#14856#14478
30K → 20M17958+121#14478#14357
20M → 21M3328+324#14357#14033
21M → 35K13315+118#14033#13915
35K → 23M24012+228#13915#13687
23M → 24M13144+87#13687#13600
24M → 40K14616+130#13600#13470
40K → 25.2M1400+140#13470#13330
25.2M → Finish5283-31#13330#13361
TOTALS28811084+1797
📊

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