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BOSTON MARATHON 2025

Ashley Iwasaki

Bib: 13813•F

UT

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 42%
Gender (Female)
#0 / 12228
Top 27%
Masters (Masters Women)
#0 / 6759
Top 12%
Division (F45-49)
#0 / 1813
Top 14%
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
7:54/mi
24:33
↑ 97↓ 3451.5%
10K· 6.21 mi
7:41/mi
48:24
↑ 79↓ 1380.4%
15K· 9.32 mi
7:41/mi
1:12:15
↑ 67↓ 78
20K· 12.43 mi
7:42/mi
1:36:09
↑ 106↓ 860.1%
Half· 13.11 mi
7:30/mi
1:41:16
↑ 19↓ 370.5%
25K· 15.53 mi
7:37/mi
1:59:43
↑ 66↓ 880.2%
30K· 18.64 mi
7:52/mi
2:24:08
↑ 181↓ 1480.2%
20M
8:04/mi
2:35:06
↑ 64↓ 500.2%
21M
8:13/mi
2:43:19
↑ 106↓ 241.6%
35K· 21.75 mi
7:57/mi
2:49:16
↑ 17↓ 861.7%
23M
8:08/mi
2:59:27
↑ 23↓ 630.6%
24M
8:05/mi
3:07:32
↓ 821.3%
40K· 24.85 mi
8:19/mi
3:14:39
↓ 200.3%
25.2M
9:11/mi
3:17:49
↑ 13↓ 160.2%
Finish· 26.22 mi
8:05/mi
3:26:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:16
Pace7:43 /mi
2nd Half
Distance13.11 mi
Time1:44:47
Pace8:00 /mi
📊Positive Split: 3.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:54:2324:337:5424:33
7:54
-
10K
6.21 mi11:18:1448:247:4723:51
7:41
-0:13
15K
9.32 mi11:42:051:12:157:4523:51
7:41
0:00
20K
12.43 mi12:05:591:36:097:4423:54
7:42
+0:01
Half
13.11 mi12:11:061:41:167:435:07
7:30
-0:12
25K
15.53 mi12:29:331:59:437:4218:27
7:37
+0:07
30K
18.64 mi12:53:582:24:087:4424:25
7:52
+0:15
20M
20.00 mi13:04:562:35:067:4510:58
8:04
+0:12
21M
21.00 mi13:13:092:43:197:478:13
8:13
+0:09
35K
21.75 mi13:19:062:49:167:475:57
7:57
-0:16
23M
23.00 mi13:29:172:59:277:4810:11
8:08
+0:11
24M
24.00 mi13:37:223:07:327:498:05
8:05
-0:03
40K
24.85 mi13:44:293:14:397:507:07
8:19
+0:14
25.2M
25.20 mi13:47:393:17:497:513:10
9:11
+0:52
Finish
26.22 mi13:55:533:26:037:528:14
8:05
-1:06

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

7:30 /mi

Average Pace

7:52 /mi

Slowest Pace

9:11 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:35:10

46% of race

Time at Steady Pace

1:32:23

45% of race

Time at Slower Pace

18:30

9% of race

Average Pace: 7:52 /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 mi10:54:2324:337:5424:33
7:54
#15704
10K
6.21 mi11:18:1448:247:4723:51
7:41
#14683
15K
9.32 mi11:42:051:12:157:4523:51
7:41
#14214
20K
12.43 mi12:05:591:36:097:4423:54
7:42
#13691
Half
13.11 mi12:11:061:41:167:435:07
7:30
#13574
25K
15.53 mi12:29:331:59:437:4218:27
7:37
#13074
30K
18.64 mi12:53:582:24:087:4424:25
7:52
#12526
20M
20.00 mi13:04:562:35:067:4510:58
8:04
#12374
21M
21.00 mi13:13:092:43:197:478:13
8:13
#12111
35K
21.75 mi13:19:062:49:167:475:57
7:57
#12089
23M
23.00 mi13:29:172:59:277:4810:11
8:08
#11982
24M
24.00 mi13:37:223:07:327:498:05
8:05
#11959
40K
24.85 mi13:44:293:14:397:507:07
8:19
#11956
25.2M
25.20 mi13:47:393:17:497:513:10
9:11
#11957
Finish
26.22 mi13:55:533:26:037:528:14
8:05
#12014
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi157044956495613266(Top 47%)3592(Top 29%)3592(Top 198%)
10K6.21 mi3.10 mi14683+10214354+6024354+60213685(Top 48%)3768(Top 31%)3768(Top 208%)
15K9.32 mi3.11 mi14214+4694093+2614093+26113266(Top 47%)3592(Top 29%)3592(Top 198%)
20K12.43 mi3.11 mi13691+5233837+2563837+25612360(Top 44%)3202(Top 26%)3202(Top 177%)
Half13.11 mi0.68 mi13574+1173773+643773+6411788(Top 42%)2827(Top 23%)2827(Top 156%)
25K15.53 mi2.42 mi13074+5003518+2553518+25510881(Top 38%)2529(Top 21%)2529(Top 139%)
30K18.64 mi3.11 mi12526+5483281+2373281+23710364(Top 36%)2473(Top 20%)2473(Top 136%)
20M20.00 mi1.36 mi12374+1523238+433238+4310924(Top 38%)2911(Top 24%)2911(Top 161%)
21M21.00 mi1.00 mi12111+2633133+1053133+1058727(Top 31%)2054(Top 17%)2054(Top 113%)
35K21.75 mi0.75 mi12089+223149-163149-1611967(Top 42%)3624(Top 30%)3624(Top 200%)
23M23.00 mi1.25 mi11982+1073125+243125+2410963(Top 39%)3209(Top 26%)3209(Top 177%)
24M24.00 mi1.00 mi11959+233149-243149-2411814(Top 42%)3709(Top 30%)3709(Top 205%)
40K24.85 mi0.85 mi11956+33195-463195-4612309(Top 43%)4078(Top 33%)4078(Top 225%)
25.2M25.20 mi0.35 mi11957-13204-93204-912840(Top 45%)4398(Top 36%)4398(Top 243%)
Finish26.22 mi1.02 mi12014-573253-493253-4913459(Top 47%)4667(Top 38%)4667(Top 257%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 47%
×21story building
+97ft-345ft

Overall

13266

Females

3592

F45-49

3592

5K→10K

3.1 - 6.2 mi

Top 48%
×5story building
+79ft-138ft

Overall

13685

Females

3768

F45-49

3768

10K→15K

6.2 - 9.3 mi

Top 47%
×3story building
+67ft-78ft

Overall

13266

Females

3592

F45-49

3592

15K→20K

9.3 - 12.4 mi

Top 44%
×5story building
+106ft-86ft

Overall

12360

Females

3202

F45-49

3202

20K→Half

12.4 - 13.1 mi

Top 42%
×2story building
+19ft-37ft

Overall

11788

Females

2827

F45-49

2827

Half→25K

13.1 - 15.5 mi

Top 38%
×4story building
+66ft-88ft

Overall

10881

Females

2529

F45-49

2529

25K→30K

15.5 - 18.6 mi

Top 36%
×9story building
+181ft-148ft

Overall

10364

Females

2473

F45-49

2473

30K→20M

18.6 - 20.0 mi

Top 38%
×5story building
+64ft-50ft

Overall

10924

Females

2911

F45-49

2911

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8727

Females

2054

F45-49

2054

21M→35K

21.0 - 21.8 mi

Top 42%
×7story building
+17ft-86ft

Overall

11967

Females

3624

F45-49

3624

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

10963

Females

3209

F45-49

3209

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

11814

Females

3709

F45-49

3709

24M→40K

24.0 - 24.9 mi

Top 43%
×1story
+6ft-20ft

Overall

12309

Females

4078

F45-49

4078

40K→25.2M

24.9 - 25.2 mi

Top 45%
×1story
+13ft-16ft

Overall

12840

Females

4398

F45-49

4398

25.2M→Finish

25.2 - 26.2 mi

Top 47%
×2story building
+22ft-21ft

Overall

13459

Females

4667

F45-49

4667

Passing Analysis

Category:
Athletes Passed
4244
Passed By
554
Net Change
+3690
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15704
5K → 10K106746+1021#15704#14683
10K → 15K50334+469#14683#14214
15K → 20K53916+523#14214#13691
20K → Half1214+117#13691#13574
Half → 25K5022+500#13574#13074
25K → 30K56618+548#13074#12526
30K → 20M19139+152#12526#12374
20M → 21M27411+263#12374#12111
21M → 35K7553+22#12111#12089
35K → 23M15346+107#12089#11982
23M → 24M8865+23#11982#11959
24M → 40K8380+3#11959#11956
40K → 25.2M3031-1#11956#11957
25.2M → Finish52109-57#11957#12014
TOTALS4244554+3690
📊

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