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BOSTON MARATHON 2025

Nancy Olson

Bib: 24824•F

CO

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Masters (Masters Women)
#0 / 6759
Division (F60-64)
#0 / 624
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
28:15
Rank: #22831
Start → 5K
9:06/mi
28:15 split
10K· 6.21 mi
56:26
Rank: #22749 (+82)
5K → 10K
9:04/mi
28:11 split
15K· 9.32 mi
1:25:11
Rank: #22878 (-129)
10K → 15K
9:15/mi
28:45 split
20K· 12.43 mi
1:54:42
Rank: #22915 (-37)
15K → 20K
9:30/mi
29:31 split
Half· 13.11 mi
2:01:10
Rank: #22939 (-24)
20K → Half
9:29/mi
6:28 split
25K· 15.53 mi
2:24:49
Rank: #22866 (+73)
Half → 25K
9:45/mi
23:39 split
30K· 18.64 mi
2:59:28
Rank: #23178 (-312)
25K → 30K
11:09/mi
34:39 split
20M
3:13:21
Rank: #23059 (+119)
30K → 20M
10:13/mi
13:53 split
21M
3:24:12
Rank: #22937 (+122)
20M → 21M
10:51/mi
10:51 split
35K· 21.75 mi
3:31:59
Rank: #22937
21M → 35K
10:24/mi
7:47 split
23M
3:44:31
Rank: #22792 (+145)
35K → 23M
10:01/mi
12:32 split
24M
3:54:12
Rank: #22658 (+134)
23M → 24M
9:41/mi
9:41 split
40K· 24.85 mi
4:02:38
Rank: #22574 (+84)
24M → 40K
9:52/mi
8:26 split
25.2M
4:06:24
Rank: #22540 (+34)
40K → 25.2M
10:55/mi
3:46 split
Finish· 26.22 mi
4:16:23
Rank: #22518 (+22)
25.2M → Finish
9:48/mi
9:59 split

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time2:01:10
Pace9:15 /mi
2nd Half
Distance13.11 mi
Time2:15:13
Pace10:19 /mi
📊Positive Split: 11.6% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:28:3028:159:0628:15
9:06
-
10K
6.21 mi11:56:4156:269:0528:11
9:04
-0:02
15K
9.32 mi12:25:261:25:119:0828:45
9:15
+0:11
20K
12.43 mi12:54:571:54:429:1429:31
9:30
+0:15
Half
13.11 mi13:01:252:01:109:156:28
9:29
-0:01
25K
15.53 mi13:25:042:24:499:1923:39
9:45
+0:16
30K
18.64 mi13:59:432:59:289:3834:39
11:09
+1:24
20M
20.00 mi14:13:363:13:219:4013:53
10:13
-0:56
21M
21.00 mi14:24:273:24:129:4310:51
10:51
+0:38
35K
21.75 mi14:32:143:31:599:457:47
10:24
-0:27
23M
23.00 mi14:44:463:44:319:4612:32
10:01
-0:23
24M
24.00 mi14:54:273:54:129:469:41
9:41
-0:20
40K
24.85 mi15:02:534:02:389:468:26
9:52
+0:11
25.2M
25.20 mi15:06:394:06:249:473:46
10:55
+1:03
Finish
26.22 mi15:16:384:16:239:479:59
9:48
-1:07

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

9:04 /mi

Average Pace

9:47 /mi

Slowest Pace

11:09 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:31:39

36% of race

Time at Steady Pace

1:33:48

37% of race

Time at Slower Pace

1:10:56

28% of race

Average Pace: 9:47 /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 mi11:28:3028:159:0628:15
9:06
#22831
10K
6.21 mi11:56:4156:269:0528:11
9:04
#22749
15K
9.32 mi12:25:261:25:119:0828:45
9:15
#22878
20K
12.43 mi12:54:571:54:429:1429:31
9:30
#22915
Half
13.11 mi13:01:252:01:109:156:28
9:29
#22939
25K
15.53 mi13:25:042:24:499:1923:39
9:45
#22866
30K
18.64 mi13:59:432:59:289:3834:39
11:09
#23178
20M
20.00 mi14:13:363:13:219:4013:53
10:13
#23059
21M
21.00 mi14:24:273:24:129:4310:51
10:51
#22937
35K
21.75 mi14:32:143:31:599:457:47
10:24
#22937
23M
23.00 mi14:44:463:44:319:4612:32
10:01
#22792
24M
24.00 mi14:54:273:54:129:469:41
9:41
#22658
40K
24.85 mi15:02:534:02:389:468:26
9:52
#22574
25.2M
25.20 mi15:06:394:06:249:473:46
10:55
#22540
Finish
26.22 mi15:16:384:16:239:479:59
9:48
#22518
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF60-64Seg. OverallSeg. FemalesSeg. F60-64
5K3.11 mi3.11 mi228319088908823060(Top 81%)9127(Top 75%)9127(Top 1463%)
10K6.21 mi3.10 mi22749+829018+709018+7022708(Top 80%)8975(Top 73%)8975(Top 1438%)
15K9.32 mi3.11 mi22878-1299057-399057-3923060(Top 81%)9127(Top 75%)9127(Top 1463%)
20K12.43 mi3.11 mi22915-379079-229079-2222909(Top 81%)9097(Top 74%)9097(Top 1458%)
Half13.11 mi0.68 mi22939-249094-159094-1523524(Top 83%)9438(Top 77%)9438(Top 1513%)
25K15.53 mi2.42 mi22866+739073+219073+2122661(Top 80%)9015(Top 74%)9015(Top 1445%)
30K18.64 mi3.11 mi23178-3129285-2129285-21224301(Top 86%)10026(Top 82%)10026(Top 1607%)
20M20.00 mi1.36 mi23059+1199245+409245+4021630(Top 76%)8702(Top 71%)8702(Top 1395%)
21M21.00 mi1.00 mi22937+1229194+519194+5120993(Top 74%)8449(Top 69%)8449(Top 1354%)
35K21.75 mi0.75 mi229379209-159209-1522971(Top 81%)9541(Top 78%)9541(Top 1529%)
23M23.00 mi1.25 mi22792+1459149+609149+6020541(Top 72%)8322(Top 68%)8322(Top 1334%)
24M24.00 mi1.00 mi22658+1349103+469103+4620343(Top 72%)8269(Top 68%)8269(Top 1325%)
40K24.85 mi0.85 mi22574+849070+339070+3320030(Top 71%)8184(Top 67%)8184(Top 1312%)
25.2M25.20 mi0.35 mi22540+349058+129058+1220445(Top 72%)8393(Top 69%)8393(Top 1345%)
Finish26.22 mi1.02 mi22518+229070-129070-1222281(Top 78%)9314(Top 76%)9314(Top 1493%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

23060

Females

9127

F60-64

9127

5K→10K

3.1 - 6.2 mi

Top 80%
×5story building
+79ft-138ft

Overall

22708

Females

8975

F60-64

8975

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

23060

Females

9127

F60-64

9127

15K→20K

9.3 - 12.4 mi

Top 81%
×5story building
+106ft-86ft

Overall

22909

Females

9097

F60-64

9097

20K→Half

12.4 - 13.1 mi

Top 83%
×2story building
+19ft-37ft

Overall

23524

Females

9438

F60-64

9438

Half→25K

13.1 - 15.5 mi

Top 80%
×4story building
+66ft-88ft

Overall

22661

Females

9015

F60-64

9015

25K→30K

15.5 - 18.6 mi

Top 86%
×9story building
+181ft-148ft

Overall

24301

Females

10026

F60-64

10026

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

21630

Females

8702

F60-64

8702

20M→21M

20.0 - 21.0 mi

Top 74%
×8story building
+106ft-24ft

Overall

20993

Females

8449

F60-64

8449

21M→35K

21.0 - 21.8 mi

Top 81%
×7story building
+17ft-86ft

Overall

22971

Females

9541

F60-64

9541

35K→23M

21.8 - 23.0 mi

Top 72%
×5story building
+23ft-63ft

Overall

20541

Females

8322

F60-64

8322

23M→24M

23.0 - 24.0 mi

Top 72%
×6story building
+12ft-82ft

Overall

20343

Females

8269

F60-64

8269

24M→40K

24.0 - 24.9 mi

Top 71%
×1story
+6ft-20ft

Overall

20030

Females

8184

F60-64

8184

40K→25.2M

24.9 - 25.2 mi

Top 72%
×1story
+13ft-16ft

Overall

20445

Females

8393

F60-64

8393

25.2M→Finish

25.2 - 26.2 mi

Top 78%
×2story building
+22ft-21ft

Overall

22281

Females

9314

F60-64

9314

Passing Analysis

Category:
Athletes Passed
1655
Passed By
1342
Net Change
+313
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#22831
5K → 10K282200+82#22831#22749
10K → 15K123252-129#22749#22878
15K → 20K167204-37#22878#22915
20K → Half2549-24#22915#22939
Half → 25K17198+73#22939#22866
25K → 30K81393-312#22866#23178
30K → 20M14526+119#23178#23059
20M → 21M13816+122#23059#22937
21M → 35K45450#22937#22937
35K → 23M1505+145#22937#22792
23M → 24M1384+134#22792#22658
24M → 40K895+84#22658#22574
40K → 25.2M384+34#22574#22540
25.2M → Finish6341+22#22540#22518
TOTALS16551342+313
📊

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