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BOSTON MARATHON 2025

Marilyn Tarkalson

Bib: 10807•F

ID

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 36%
Gender (Female)
#0 / 12228
Top 19%
Masters (Masters Women)
#0 / 6759
Top 8%
Division (F45-49)
#0 / 1813
Top 9%
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
7:30/mi
23:17
↑ 97↓ 3451.5%
10K· 6.21 mi
7:34/mi
46:46
↑ 79↓ 1380.4%
15K· 9.32 mi
7:26/mi
1:09:53
↑ 67↓ 78
20K· 12.43 mi
7:32/mi
1:33:17
↑ 106↓ 860.1%
Half· 13.11 mi
7:15/mi
1:38:14
↑ 19↓ 370.5%
25K· 15.53 mi
7:27/mi
1:56:19
↑ 66↓ 880.2%
30K· 18.64 mi
7:41/mi
2:20:11
↑ 181↓ 1480.2%
20M
7:46/mi
2:30:44
↑ 64↓ 500.2%
21M
8:03/mi
2:38:47
↑ 106↓ 241.6%
35K· 21.75 mi
7:24/mi
2:44:19
↑ 17↓ 861.7%
23M
7:55/mi
2:54:14
↑ 23↓ 630.6%
24M
8:27/mi
3:02:41
↓ 821.3%
40K· 24.85 mi
8:10/mi
3:09:40
↓ 200.3%
25.2M
8:36/mi
3:12:38
↑ 13↓ 160.2%
Finish· 26.22 mi
7:41/mi
3:20:28
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:38:14
Pace7:30 /mi
2nd Half
Distance13.11 mi
Time1:42:14
Pace7:48 /mi
📊Positive Split: 4.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:50:0323:177:3023:17
7:30
-
10K
6.21 mi11:13:3246:467:3223:29
7:34
+0:04
15K
9.32 mi11:36:391:09:537:3023:07
7:26
-0:08
20K
12.43 mi12:00:031:33:177:3023:24
7:32
+0:06
Half
13.11 mi12:05:001:38:147:304:57
7:15
-0:17
25K
15.53 mi12:23:051:56:197:2918:05
7:27
+0:12
30K
18.64 mi12:46:572:20:117:3123:52
7:41
+0:14
20M
20.00 mi12:57:302:30:447:3210:33
7:46
+0:05
21M
21.00 mi13:05:332:38:477:348:03
8:03
+0:17
35K
21.75 mi13:11:052:44:197:335:32
7:24
-0:39
23M
23.00 mi13:21:002:54:147:359:55
7:55
+0:31
24M
24.00 mi13:29:273:02:417:378:27
8:27
+0:32
40K
24.85 mi13:36:263:09:407:386:59
8:10
-0:17
25.2M
25.20 mi13:39:243:12:387:392:58
8:36
+0:26
Finish
26.22 mi13:47:143:20:287:397:50
7:41
-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

7:15 /mi

Average Pace

7:39 /mi

Slowest Pace

8:36 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:54:01

87% of race

Time at Steady Pace

23:29

12% of race

Time at Slower Pace

2:58

1% of race

Average Pace: 7:39 /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 mi10:50:0323:177:3023:17
7:30
#12204
10K
6.21 mi11:13:3246:467:3223:29
7:34
#12365
15K
9.32 mi11:36:391:09:537:3023:07
7:26
#11970
20K
12.43 mi12:00:031:33:177:3023:24
7:32
#11683
Half
13.11 mi12:05:001:38:147:304:57
7:15
#11582
25K
15.53 mi12:23:051:56:197:2918:05
7:27
#11229
30K
18.64 mi12:46:572:20:117:3123:52
7:41
#10770
20M
20.00 mi12:57:302:30:447:3210:33
7:46
#10573
21M
21.00 mi13:05:332:38:477:348:03
8:03
#10342
35K
21.75 mi13:11:052:44:197:335:32
7:24
#10229
23M
23.00 mi13:21:002:54:147:359:55
7:55
#10148
24M
24.00 mi13:29:273:02:417:378:27
8:27
#10328
40K
24.85 mi13:36:263:09:407:386:59
8:10
#10328
25.2M
25.20 mi13:39:243:12:387:392:58
8:36
#10310
Finish
26.22 mi13:47:143:20:287:397:50
7:41
#10286
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi122042905290511257(Top 40%)2506(Top 20%)2506(Top 138%)
10K6.21 mi3.10 mi12365-1612996-912996-9112653(Top 45%)3171(Top 26%)3171(Top 175%)
15K9.32 mi3.11 mi11970+3952815+1812815+18111257(Top 40%)2506(Top 20%)2506(Top 138%)
20K12.43 mi3.11 mi11683+2872705+1102705+11011042(Top 39%)2494(Top 20%)2494(Top 138%)
Half13.11 mi0.68 mi11582+1012651+542651+549696(Top 34%)1824(Top 15%)1824(Top 101%)
25K15.53 mi2.42 mi11229+3532506+1452506+1459643(Top 34%)1956(Top 16%)1956(Top 108%)
30K18.64 mi3.11 mi10770+4592345+1612345+1619090(Top 32%)1883(Top 15%)1883(Top 104%)
20M20.00 mi1.36 mi10573+1972290+552290+558823(Top 31%)1904(Top 16%)1904(Top 105%)
21M21.00 mi1.00 mi10342+2312216+742216+747680(Top 27%)1589(Top 13%)1589(Top 88%)
35K21.75 mi0.75 mi10229+1132172+442172+447963(Top 28%)1680(Top 14%)1680(Top 93%)
23M23.00 mi1.25 mi10148+812183-112183-119461(Top 33%)2481(Top 20%)2481(Top 137%)
24M24.00 mi1.00 mi10328-1802303-1202303-12014204(Top 50%)4923(Top 40%)4923(Top 272%)
40K24.85 mi0.85 mi103282338-352338-3511379(Top 40%)3588(Top 29%)3588(Top 198%)
25.2M25.20 mi0.35 mi10310+182349-112349-119479(Top 33%)2756(Top 23%)2756(Top 152%)
Finish26.22 mi1.02 mi10286+242368-192368-1910625(Top 37%)3270(Top 27%)3270(Top 180%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 40%
×21story building
+97ft-345ft

Overall

11257

Females

2506

F45-49

2506

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12653

Females

3171

F45-49

3171

10K→15K

6.2 - 9.3 mi

Top 40%
×3story building
+67ft-78ft

Overall

11257

Females

2506

F45-49

2506

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

11042

Females

2494

F45-49

2494

20K→Half

12.4 - 13.1 mi

Top 34%
×2story building
+19ft-37ft

Overall

9696

Females

1824

F45-49

1824

Half→25K

13.1 - 15.5 mi

Top 34%
×4story building
+66ft-88ft

Overall

9643

Females

1956

F45-49

1956

25K→30K

15.5 - 18.6 mi

Top 32%
×9story building
+181ft-148ft

Overall

9090

Females

1883

F45-49

1883

30K→20M

18.6 - 20.0 mi

Top 31%
×5story building
+64ft-50ft

Overall

8823

Females

1904

F45-49

1904

20M→21M

20.0 - 21.0 mi

Top 27%
×8story building
+106ft-24ft

Overall

7680

Females

1589

F45-49

1589

21M→35K

21.0 - 21.8 mi

Top 28%
×7story building
+17ft-86ft

Overall

7963

Females

1680

F45-49

1680

35K→23M

21.8 - 23.0 mi

Top 33%
×5story building
+23ft-63ft

Overall

9461

Females

2481

F45-49

2481

23M→24M

23.0 - 24.0 mi

Top 50%
×6story building
+12ft-82ft

Overall

14204

Females

4923

F45-49

4923

24M→40K

24.0 - 24.9 mi

Top 40%
×1story
+6ft-20ft

Overall

11379

Females

3588

F45-49

3588

40K→25.2M

24.9 - 25.2 mi

Top 33%
×1story
+13ft-16ft

Overall

9479

Females

2756

F45-49

2756

25.2M→Finish

25.2 - 26.2 mi

Top 37%
×2story building
+22ft-21ft

Overall

10625

Females

3270

F45-49

3270

Passing Analysis

Category:
Athletes Passed
2931
Passed By
1013
Net Change
+1918
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12204
5K → 10K189350-161#12204#12365
10K → 15K43540+395#12365#11970
15K → 20K34659+287#11970#11683
20K → Half1065+101#11683#11582
Half → 25K36815+353#11582#11229
25K → 30K50243+459#11229#10770
30K → 20M21821+197#10770#10573
20M → 21M24817+231#10573#10342
21M → 35K12310+113#10342#10229
35K → 23M14665+81#10229#10148
23M → 24M42222-180#10148#10328
24M → 40K84840#10328#10328
40K → 25.2M3820+18#10328#10310
25.2M → Finish8662+24#10310#10286
TOTALS29311013+1918
📊

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