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BOSTON MARATHON 2025

Nadia Chisler

Bib: 22001•F

NM

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Top 39%
Masters (Masters Women)
#0 / 6759
Top 25%
Division (F50-54)
#0 / 1303
Top 16%
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
8:03/mi
25:01
↑ 97↓ 3451.5%
10K· 6.21 mi
7:59/mi
49:49
↑ 79↓ 1380.4%
15K· 9.32 mi
7:59/mi
1:14:36
↑ 67↓ 78
20K· 12.43 mi
8:06/mi
1:39:45
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:45:14
↑ 19↓ 370.5%
25K· 15.53 mi
8:13/mi
2:05:09
↑ 66↓ 880.2%
30K· 18.64 mi
8:40/mi
2:32:05
↑ 181↓ 1480.2%
20M
8:37/mi
2:43:47
↑ 64↓ 500.2%
21M
9:12/mi
2:52:59
↑ 106↓ 241.6%
35K· 21.75 mi
7:55/mi
2:58:54
↑ 17↓ 861.7%
23M
8:12/mi
3:09:11
↑ 23↓ 630.6%
24M
8:12/mi
3:17:23
↓ 821.3%
40K· 24.85 mi
8:19/mi
3:24:30
↓ 200.3%
25.2M
9:20/mi
3:27:43
↑ 13↓ 160.2%
Finish· 26.22 mi
7:59/mi
3:35:51
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:14
Pace8:02 /mi
2nd Half
Distance13.11 mi
Time1:50:37
Pace8:26 /mi
📊Positive Split: 5.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:22:0025:018:0325:01
8:03
-
10K
6.21 mi11:46:4849:498:0124:48
7:59
-0:04
15K
9.32 mi12:11:351:14:368:0024:48
7:59
0:00
20K
12.43 mi12:36:441:39:458:0225:09
8:06
+0:07
Half
13.11 mi12:42:131:45:148:025:29
8:02
-0:04
25K
15.53 mi13:02:082:05:098:0319:55
8:13
+0:11
30K
18.64 mi13:29:042:32:058:1026:56
8:40
+0:27
20M
20.00 mi13:40:462:43:478:1111:42
8:37
-0:03
21M
21.00 mi13:49:582:52:598:149:12
9:12
+0:35
35K
21.75 mi13:55:532:58:548:145:55
7:55
-1:17
23M
23.00 mi14:06:103:09:118:1410:17
8:12
+0:17
24M
24.00 mi14:14:223:17:238:138:12
8:12
0:00
40K
24.85 mi14:21:293:24:308:147:07
8:19
+0:07
25.2M
25.20 mi14:24:423:27:438:153:13
9:20
+1:01
Finish
26.22 mi14:32:503:35:518:148:08
7:59
-1:21

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

7:55 /mi

Average Pace

8:14 /mi

Slowest Pace

9:20 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:23:26

94% of race

Time at Steady Pace

12:25

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:14 /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 mi11:22:0025:018:0325:01
8:03
#17023
10K
6.21 mi11:46:4849:498:0124:48
7:59
#16644
15K
9.32 mi12:11:351:14:368:0024:48
7:59
#16365
20K
12.43 mi12:36:441:39:458:0225:09
8:06
#16143
Half
13.11 mi12:42:131:45:148:025:29
8:02
#16150
25K
15.53 mi13:02:082:05:098:0319:55
8:13
#15995
30K
18.64 mi13:29:042:32:058:1026:56
8:40
#15926
20M
20.00 mi13:40:462:43:478:1111:42
8:37
#15779
21M
21.00 mi13:49:582:52:598:149:12
9:12
#15667
35K
21.75 mi13:55:532:58:548:145:55
7:55
#15508
23M
23.00 mi14:06:103:09:118:1410:17
8:12
#15227
24M
24.00 mi14:14:223:17:238:138:12
8:12
#15056
40K
24.85 mi14:21:293:24:308:147:07
8:19
#14939
25.2M
25.20 mi14:24:423:27:438:153:13
9:20
#14902
Finish
26.22 mi14:32:503:35:518:148:08
7:59
#14787
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi170235747574715886(Top 56%)5088(Top 42%)5088(Top 390%)
10K6.21 mi3.10 mi16644+3795523+2245523+22416317(Top 57%)5324(Top 44%)5324(Top 409%)
15K9.32 mi3.11 mi16365+2795353+1705353+17015886(Top 56%)5088(Top 42%)5088(Top 390%)
20K12.43 mi3.11 mi16143+2225234+1195234+11915614(Top 55%)4976(Top 41%)4976(Top 382%)
Half13.11 mi0.68 mi16150-75246-125246-1216208(Top 57%)5295(Top 43%)5295(Top 406%)
25K15.53 mi2.42 mi15995+1555162+845162+8415401(Top 54%)4954(Top 41%)4954(Top 380%)
30K18.64 mi3.11 mi15926+695179-175179-1715822(Top 56%)5352(Top 44%)5352(Top 411%)
20M20.00 mi1.36 mi15779+1475140+395140+3914510(Top 51%)4779(Top 39%)4779(Top 367%)
21M21.00 mi1.00 mi15667+1125118+225118+2214650(Top 52%)4968(Top 41%)4968(Top 381%)
35K21.75 mi0.75 mi15508+1595031+875031+8711711(Top 41%)3513(Top 29%)3513(Top 270%)
23M23.00 mi1.25 mi15227+2814910+1214910+12111398(Top 40%)3444(Top 28%)3444(Top 264%)
24M24.00 mi1.00 mi15056+1714835+754835+7512625(Top 44%)4136(Top 34%)4136(Top 317%)
40K24.85 mi0.85 mi14939+1174793+424793+4212338(Top 43%)4107(Top 34%)4107(Top 315%)
25.2M25.20 mi0.35 mi14902+374786+74786+713666(Top 48%)4846(Top 40%)4846(Top 372%)
Finish26.22 mi1.02 mi14787+1154749+374749+3712788(Top 45%)4331(Top 35%)4331(Top 332%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15886

Females

5088

F50-54

5088

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

16317

Females

5324

F50-54

5324

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15886

Females

5088

F50-54

5088

15K→20K

9.3 - 12.4 mi

Top 55%
×5story building
+106ft-86ft

Overall

15614

Females

4976

F50-54

4976

20K→Half

12.4 - 13.1 mi

Top 57%
×2story building
+19ft-37ft

Overall

16208

Females

5295

F50-54

5295

Half→25K

13.1 - 15.5 mi

Top 54%
×4story building
+66ft-88ft

Overall

15401

Females

4954

F50-54

4954

25K→30K

15.5 - 18.6 mi

Top 56%
×9story building
+181ft-148ft

Overall

15822

Females

5352

F50-54

5352

30K→20M

18.6 - 20.0 mi

Top 51%
×5story building
+64ft-50ft

Overall

14510

Females

4779

F50-54

4779

20M→21M

20.0 - 21.0 mi

Top 52%
×8story building
+106ft-24ft

Overall

14650

Females

4968

F50-54

4968

21M→35K

21.0 - 21.8 mi

Top 41%
×7story building
+17ft-86ft

Overall

11711

Females

3513

F50-54

3513

35K→23M

21.8 - 23.0 mi

Top 40%
×5story building
+23ft-63ft

Overall

11398

Females

3444

F50-54

3444

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

12625

Females

4136

F50-54

4136

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12338

Females

4107

F50-54

4107

40K→25.2M

24.9 - 25.2 mi

Top 48%
×1story
+13ft-16ft

Overall

13666

Females

4846

F50-54

4846

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

12788

Females

4331

F50-54

4331

Passing Analysis

Category:
Athletes Passed
3059
Passed By
823
Net Change
+2236
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17023
5K → 10K529150+379#17023#16644
10K → 15K35879+279#16644#16365
15K → 20K327105+222#16365#16143
20K → Half2734-7#16143#16150
Half → 25K24186+155#16150#15995
25K → 30K256187+69#15995#15926
30K → 20M19548+147#15926#15779
20M → 21M17260+112#15779#15667
21M → 35K1601+159#15667#15508
35K → 23M2865+281#15508#15227
23M → 24M18110+171#15227#15056
24M → 40K13417+117#15056#14939
40K → 25.2M5417+37#14939#14902
25.2M → Finish13924+115#14902#14787
TOTALS3059823+2236
📊

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