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BOSTON MARATHON 2025

Aleksandra Norkowska

Bib: 22512•F

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 24%
Division (F45-49)
#0 / 1813
Top 29%
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
7:42/mi
23:55
↑ 97↓ 3451.5%
10K· 6.21 mi
7:39/mi
47:41
↑ 79↓ 1380.4%
15K· 9.32 mi
7:48/mi
1:11:54
↑ 67↓ 78
20K· 12.43 mi
8:02/mi
1:36:52
↑ 106↓ 860.1%
Half· 13.11 mi
7:59/mi
1:42:19
↑ 19↓ 370.5%
25K· 15.53 mi
8:18/mi
2:02:26
↑ 66↓ 880.2%
30K· 18.64 mi
8:39/mi
2:29:20
↑ 181↓ 1480.2%
20M
8:50/mi
2:41:20
↑ 64↓ 500.2%
21M
9:41/mi
2:51:01
↑ 106↓ 241.6%
35K· 21.75 mi
8:29/mi
2:57:22
↑ 17↓ 861.7%
23M
8:46/mi
3:08:21
↑ 23↓ 630.6%
24M
8:29/mi
3:16:50
↓ 821.3%
40K· 24.85 mi
8:33/mi
3:24:09
↓ 200.3%
25.2M
9:23/mi
3:27:23
↑ 13↓ 160.2%
Finish· 26.22 mi
8:09/mi
3:35:41
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:42:19
Pace7:48 /mi
2nd Half
Distance13.11 mi
Time1:53:22
Pace8:39 /mi
📊Positive Split: 10.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:2623:557:4223:55
7:42
-
10K
6.21 mi11:45:1247:417:4023:46
7:39
-0:03
15K
9.32 mi12:09:251:11:547:4324:13
7:48
+0:09
20K
12.43 mi12:34:231:36:527:4824:58
8:02
+0:14
Half
13.11 mi12:39:501:42:197:485:27
7:59
-0:03
25K
15.53 mi12:59:572:02:267:5320:07
8:18
+0:19
30K
18.64 mi13:26:512:29:208:0126:54
8:39
+0:21
20M
20.00 mi13:38:512:41:208:0412:00
8:50
+0:11
21M
21.00 mi13:48:322:51:018:099:41
9:41
+0:51
35K
21.75 mi13:54:532:57:228:096:21
8:29
-1:12
23M
23.00 mi14:05:523:08:218:1110:59
8:46
+0:17
24M
24.00 mi14:14:213:16:508:128:29
8:29
-0:17
40K
24.85 mi14:21:403:24:098:137:19
8:33
+0:04
25.2M
25.20 mi14:24:543:27:238:143:14
9:23
+0:50
Finish
26.22 mi14:33:123:35:418:148:18
8:09
-1:14

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

7:39 /mi

Average Pace

8:14 /mi

Slowest Pace

9:41 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:50:37

51% of race

Time at Steady Pace

1:09:10

32% of race

Time at Slower Pace

35:54

17% 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 mi11:21:2623:557:4223:55
7:42
#13975
10K
6.21 mi11:45:1247:417:4023:46
7:39
#13711
15K
9.32 mi12:09:251:11:547:4324:13
7:48
#13873
20K
12.43 mi12:34:231:36:527:4824:58
8:02
#14208
Half
13.11 mi12:39:501:42:197:485:27
7:59
#14282
25K
15.53 mi12:59:572:02:267:5320:07
8:18
#14562
30K
18.64 mi13:26:512:29:208:0126:54
8:39
#14830
20M
20.00 mi13:38:512:41:208:0412:00
8:50
#14873
21M
21.00 mi13:48:322:51:018:099:41
9:41
#14980
35K
21.75 mi13:54:532:57:228:096:21
8:29
#14993
23M
23.00 mi14:05:523:08:218:1110:59
8:46
#14940
24M
24.00 mi14:14:213:16:508:128:29
8:29
#14895
40K
24.85 mi14:21:403:24:098:137:19
8:33
#14837
25.2M
25.20 mi14:24:543:27:238:143:14
9:23
#14808
Finish
26.22 mi14:33:123:35:418:148:18
8:09
#14743
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi139753896389614348(Top 51%)4236(Top 35%)4236(Top 234%)
10K6.21 mi3.10 mi13711+2643772+1243772+12413477(Top 47%)3654(Top 30%)3654(Top 202%)
15K9.32 mi3.11 mi13873-1623892-1203892-12014348(Top 51%)4236(Top 35%)4236(Top 234%)
20K12.43 mi3.11 mi14208-3354127-2354127-23515195(Top 53%)4750(Top 39%)4750(Top 262%)
Half13.11 mi0.68 mi14282-744168-414168-4115839(Top 56%)5074(Top 41%)5074(Top 280%)
25K15.53 mi2.42 mi14562-2804372-2044372-20415901(Top 56%)5252(Top 43%)5252(Top 290%)
30K18.64 mi3.11 mi14830-2684582-2104582-21015761(Top 55%)5317(Top 43%)5317(Top 293%)
20M20.00 mi1.36 mi14873-434620-384620-3815849(Top 56%)5496(Top 45%)5496(Top 303%)
21M21.00 mi1.00 mi14980-1074708-884708-8816959(Top 60%)6230(Top 51%)6230(Top 344%)
35K21.75 mi0.75 mi14993-134734-264734-2615408(Top 54%)5464(Top 45%)5464(Top 301%)
23M23.00 mi1.25 mi14940+534734473414973(Top 53%)5319(Top 43%)5319(Top 293%)
24M24.00 mi1.00 mi14895+454745-114745-1114408(Top 51%)5035(Top 41%)5035(Top 278%)
40K24.85 mi0.85 mi14837+584738+74738+713814(Top 49%)4862(Top 40%)4862(Top 268%)
25.2M25.20 mi0.35 mi14808+294726+124726+1213929(Top 49%)4972(Top 41%)4972(Top 274%)
Finish26.22 mi1.02 mi14743+654722+44722+413925(Top 49%)4915(Top 40%)4915(Top 271%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 51%
×21story building
+97ft-345ft

Overall

14348

Females

4236

F45-49

4236

5K→10K

3.1 - 6.2 mi

Top 47%
×5story building
+79ft-138ft

Overall

13477

Females

3654

F45-49

3654

10K→15K

6.2 - 9.3 mi

Top 51%
×3story building
+67ft-78ft

Overall

14348

Females

4236

F45-49

4236

15K→20K

9.3 - 12.4 mi

Top 53%
×5story building
+106ft-86ft

Overall

15195

Females

4750

F45-49

4750

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15839

Females

5074

F45-49

5074

Half→25K

13.1 - 15.5 mi

Top 56%
×4story building
+66ft-88ft

Overall

15901

Females

5252

F45-49

5252

25K→30K

15.5 - 18.6 mi

Top 55%
×9story building
+181ft-148ft

Overall

15761

Females

5317

F45-49

5317

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

15849

Females

5496

F45-49

5496

20M→21M

20.0 - 21.0 mi

Top 60%
×8story building
+106ft-24ft

Overall

16959

Females

6230

F45-49

6230

21M→35K

21.0 - 21.8 mi

Top 54%
×7story building
+17ft-86ft

Overall

15408

Females

5464

F45-49

5464

35K→23M

21.8 - 23.0 mi

Top 53%
×5story building
+23ft-63ft

Overall

14973

Females

5319

F45-49

5319

23M→24M

23.0 - 24.0 mi

Top 51%
×6story building
+12ft-82ft

Overall

14408

Females

5035

F45-49

5035

24M→40K

24.0 - 24.9 mi

Top 49%
×1story
+6ft-20ft

Overall

13814

Females

4862

F45-49

4862

40K→25.2M

24.9 - 25.2 mi

Top 49%
×1story
+13ft-16ft

Overall

13929

Females

4972

F45-49

4972

25.2M→Finish

25.2 - 26.2 mi

Top 49%
×2story building
+22ft-21ft

Overall

13925

Females

4915

F45-49

4915

Passing Analysis

Category:
Athletes Passed
1693
Passed By
2461
Net Change
-768
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13975
5K → 10K428164+264#13975#13711
10K → 15K133295-162#13711#13873
15K → 20K129464-335#13873#14208
20K → Half983-74#14208#14282
Half → 25K98378-280#14282#14562
25K → 30K164432-268#14562#14830
30K → 20M114157-43#14830#14873
20M → 21M83190-107#14873#14980
21M → 35K5366-13#14980#14993
35K → 23M13582+53#14993#14940
23M → 24M9853+45#14940#14895
24M → 40K9739+58#14895#14837
40K → 25.2M4819+29#14837#14808
25.2M → Finish10439+65#14808#14743
TOTALS16932461-768
📊

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