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BOSTON MARATHON 2025

Izumi Smith

Bib: 24691•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Top 48%
Division (F60-64)
#0 / 624
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
8:12/mi
25:29
↑ 97↓ 3451.5%
10K· 6.21 mi
8:20/mi
51:22
↑ 79↓ 1380.4%
15K· 9.32 mi
8:24/mi
1:17:27
↑ 67↓ 78
20K· 12.43 mi
8:26/mi
1:43:39
↑ 106↓ 860.1%
Half· 13.11 mi
8:17/mi
1:49:18
↑ 19↓ 370.5%
25K· 15.53 mi
8:31/mi
2:09:57
↑ 66↓ 880.2%
30K· 18.64 mi
9:16/mi
2:38:44
↑ 181↓ 1480.2%
20M
9:59/mi
2:52:18
↑ 64↓ 500.2%
21M
10:18/mi
3:02:36
↑ 106↓ 241.6%
35K· 21.75 mi
9:15/mi
3:09:31
↑ 17↓ 861.7%
23M
9:27/mi
3:21:21
↑ 23↓ 630.6%
24M
8:59/mi
3:30:20
↓ 821.3%
40K· 24.85 mi
9:41/mi
3:38:37
↓ 200.3%
25.2M
10:06/mi
3:42:06
↑ 13↓ 160.2%
Finish· 26.22 mi
9:11/mi
3:51:27
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:18
Pace8:20 /mi
2nd Half
Distance13.11 mi
Time2:02:09
Pace9:19 /mi
📊Positive Split: 11.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:25:1225:298:1225:29
8:12
-
10K
6.21 mi11:51:0551:228:1625:53
8:20
+0:08
15K
9.32 mi12:17:101:17:278:1926:05
8:24
+0:04
20K
12.43 mi12:43:221:43:398:2026:12
8:26
+0:02
Half
13.11 mi12:49:011:49:188:205:39
8:17
-0:09
25K
15.53 mi13:09:402:09:578:2220:39
8:31
+0:14
30K
18.64 mi13:38:272:38:448:3128:47
9:16
+0:45
20M
20.00 mi13:52:012:52:188:3713:34
9:59
+0:43
21M
21.00 mi14:02:193:02:368:4210:18
10:18
+0:19
35K
21.75 mi14:09:143:09:318:436:55
9:15
-1:03
23M
23.00 mi14:21:043:21:218:4511:50
9:27
+0:12
24M
24.00 mi14:30:033:30:208:468:59
8:59
-0:28
40K
24.85 mi14:38:203:38:378:488:17
9:41
+0:42
25.2M
25.20 mi14:41:493:42:068:493:29
10:06
+0:25
Finish
26.22 mi14:51:103:51:278:509:21
9:11
-0:55

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

8:12 /mi

Average Pace

8:50 /mi

Slowest Pace

10:18 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:09:57

56% of race

Time at Steady Pace

1:05:52

28% of race

Time at Slower Pace

35:38

15% of race

Average Pace: 8:50 /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 mi11:25:1225:298:1225:29
8:12
#18133
10K
6.21 mi11:51:0551:228:1625:53
8:20
#18423
15K
9.32 mi12:17:101:17:278:1926:05
8:24
#18465
20K
12.43 mi12:43:221:43:398:2026:12
8:26
#18255
Half
13.11 mi12:49:011:49:188:205:39
8:17
#18218
25K
15.53 mi13:09:402:09:578:2220:39
8:31
#18027
30K
18.64 mi13:38:272:38:448:3128:47
9:16
#18241
20M
20.00 mi13:52:012:52:188:3713:34
9:59
#18521
21M
21.00 mi14:02:193:02:368:4210:18
10:18
#18591
35K
21.75 mi14:09:143:09:318:436:55
9:15
#18633
23M
23.00 mi14:21:043:21:218:4511:50
9:27
#18613
24M
24.00 mi14:30:033:30:208:468:59
8:59
#18556
40K
24.85 mi14:38:203:38:378:488:17
9:41
#18589
25.2M
25.20 mi14:41:493:42:068:493:29
10:06
#18565
Finish
26.22 mi14:51:103:51:278:509:21
9:11
#18631
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi181336428642818693(Top 66%)6720(Top 55%)6720(Top 1077%)
10K6.21 mi3.10 mi18423-2906570-1426570-14218770(Top 66%)6748(Top 55%)6748(Top 1081%)
15K9.32 mi3.11 mi18465-426603-336603-3318693(Top 66%)6720(Top 55%)6720(Top 1077%)
20K12.43 mi3.11 mi18255+2106487+1166487+11617776(Top 63%)6211(Top 51%)6211(Top 995%)
Half13.11 mi0.68 mi18218+376468+196468+1917886(Top 63%)6265(Top 51%)6265(Top 1004%)
25K15.53 mi2.42 mi18027+1916374+946374+9417321(Top 61%)6043(Top 49%)6043(Top 968%)
30K18.64 mi3.11 mi18241-2146526-1526526-15218965(Top 67%)7098(Top 58%)7098(Top 1138%)
20M20.00 mi1.36 mi18521-2806702-1766702-17620888(Top 74%)8294(Top 68%)8294(Top 1329%)
21M21.00 mi1.00 mi18591-706771-696771-6919382(Top 68%)7542(Top 62%)7542(Top 1209%)
35K21.75 mi0.75 mi18633-426809-386809-3819363(Top 68%)7638(Top 62%)7638(Top 1224%)
23M23.00 mi1.25 mi18613+206829-206829-2018486(Top 65%)7228(Top 59%)7228(Top 1158%)
24M24.00 mi1.00 mi18556+576830-16830-117307(Top 61%)6655(Top 54%)6655(Top 1067%)
40K24.85 mi0.85 mi18589-336871-416871-4119437(Top 68%)7853(Top 64%)7853(Top 1258%)
25.2M25.20 mi0.35 mi18565+246874-36874-317521(Top 62%)6875(Top 56%)6875(Top 1102%)
Finish26.22 mi1.02 mi18631-666919-456919-4519851(Top 70%)8061(Top 66%)8061(Top 1292%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 66%
×21story building
+97ft-345ft

Overall

18693

Females

6720

F60-64

6720

5K→10K

3.1 - 6.2 mi

Top 66%
×5story building
+79ft-138ft

Overall

18770

Females

6748

F60-64

6748

10K→15K

6.2 - 9.3 mi

Top 66%
×3story building
+67ft-78ft

Overall

18693

Females

6720

F60-64

6720

15K→20K

9.3 - 12.4 mi

Top 63%
×5story building
+106ft-86ft

Overall

17776

Females

6211

F60-64

6211

20K→Half

12.4 - 13.1 mi

Top 63%
×2story building
+19ft-37ft

Overall

17886

Females

6265

F60-64

6265

Half→25K

13.1 - 15.5 mi

Top 61%
×4story building
+66ft-88ft

Overall

17321

Females

6043

F60-64

6043

25K→30K

15.5 - 18.6 mi

Top 67%
×9story building
+181ft-148ft

Overall

18965

Females

7098

F60-64

7098

30K→20M

18.6 - 20.0 mi

Top 74%
×5story building
+64ft-50ft

Overall

20888

Females

8294

F60-64

8294

20M→21M

20.0 - 21.0 mi

Top 68%
×8story building
+106ft-24ft

Overall

19382

Females

7542

F60-64

7542

21M→35K

21.0 - 21.8 mi

Top 68%
×7story building
+17ft-86ft

Overall

19363

Females

7638

F60-64

7638

35K→23M

21.8 - 23.0 mi

Top 65%
×5story building
+23ft-63ft

Overall

18486

Females

7228

F60-64

7228

23M→24M

23.0 - 24.0 mi

Top 61%
×6story building
+12ft-82ft

Overall

17307

Females

6655

F60-64

6655

24M→40K

24.0 - 24.9 mi

Top 68%
×1story
+6ft-20ft

Overall

19437

Females

7853

F60-64

7853

40K→25.2M

24.9 - 25.2 mi

Top 62%
×1story
+13ft-16ft

Overall

17521

Females

6875

F60-64

6875

25.2M→Finish

25.2 - 26.2 mi

Top 70%
×2story building
+22ft-21ft

Overall

19851

Females

8061

F60-64

8061

Passing Analysis

Category:
Athletes Passed
1655
Passed By
2153
Net Change
-498
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#18133
5K → 10K159449-290#18133#18423
10K → 15K170212-42#18423#18465
15K → 20K30090+210#18465#18255
20K → Half5922+37#18255#18218
Half → 25K25867+191#18218#18027
25K → 30K172386-214#18027#18241
30K → 20M50330-280#18241#18521
20M → 21M82152-70#18521#18591
21M → 35K4688-42#18591#18633
35K → 23M11292+20#18633#18613
23M → 24M10144+57#18613#18556
24M → 40K67100-33#18556#18589
40K → 25.2M4319+24#18589#18565
25.2M → Finish36102-66#18565#18631
TOTALS16552153-498
📊

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