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BOSTON MARATHON 2025

Kelsey Bjork

IL

Bib: 16033 F

0:00
0:00
/ mi
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Overall
#0 / 28404
Top 32%
Gender (Female)
#0 / 12228
Top 15%
Division (F18-39)
#0 / 5469
Top 27%
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:34/mi
23:32
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
7:29/mi
46:48
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:24/mi
1:09:47
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:27/mi
1:32:55
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:27/mi
1:38:00
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:25/mi
1:56:00
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:36/mi
2:19:37
↑ 181↓ 1480.2%
138 ft elev
20M
7:36/mi
2:29:56
↑ 64↓ 500.2%
148 ft elev
21M
7:58/mi
2:37:54
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:26/mi
2:43:28
↑ 17↓ 861.7%
156 ft elev
23M
7:32/mi
2:52:54
↑ 23↓ 630.6%
116 ft elev
24M
7:17/mi
3:00:11
↓ 821.3%
34 ft elev
40K· 24.85 mi
7:27/mi
3:06:33
↓ 200.3%
20 ft elev
25.2M
8:16/mi
3:09:24
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
7:23/mi
3:16:55
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:38:00
Pace7:29 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:38:55
Pace7:33 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:57:4623:327:3423:32
7:34
-
10K
6.21 mi11:21:0246:487:3223:16
7:29
-0:05
15K
9.32 mi11:44:011:09:477:2922:59
7:24
-0:05
20K
12.43 mi12:07:091:32:557:2923:08
7:27
+0:03
Half
13.11 mi12:12:141:38:007:295:05
7:27
0:00
25K
15.53 mi12:30:141:56:007:2818:00
7:25
-0:02
30K
18.64 mi12:53:512:19:377:2923:37
7:36
+0:11
20M
20.00 mi13:04:102:29:567:3010:19
7:36
0:00
21M
21.00 mi13:12:082:37:547:317:58
7:58
+0:22
35K
21.75 mi13:17:422:43:287:315:34
7:26
-0:32
23M
23.00 mi13:27:082:52:547:319:26
7:32
+0:06
24M
24.00 mi13:34:253:00:117:307:17
7:17
-0:15
40K
24.85 mi13:40:473:06:337:306:22
7:27
+0:10
25.2M
25.20 mi13:43:383:09:247:312:51
8:16
+0:49
Finish
26.22 mi13:51:093:16:557:317:31
7:23
-0:53

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

7:17 /mi

Average Pace

7:31 /mi

Slowest Pace

8:16 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:14:04

99% of race

Time at Steady Pace

2:51

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:31 /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 mi10:57:4623:327:3423:32
7:34
#12902
10K
6.21 mi11:21:0246:487:3223:16
7:29
#12420
15K
9.32 mi11:44:011:09:477:2922:59
7:24
#11880
20K
12.43 mi12:07:091:32:557:2923:08
7:27
#11435
Half
13.11 mi12:12:141:38:007:295:05
7:27
#11435
25K
15.53 mi12:30:141:56:007:2818:00
7:25
#11048
30K
18.64 mi12:53:512:19:377:2923:37
7:36
#10494
20M
20.00 mi13:04:102:29:567:3010:19
7:36
#10224
21M
21.00 mi13:12:082:37:547:317:58
7:58
#9986
35K
21.75 mi13:17:422:43:287:315:34
7:26
#9888
23M
23.00 mi13:27:082:52:547:319:26
7:32
#9652
24M
24.00 mi13:34:253:00:117:307:17
7:17
#9434
40K
24.85 mi13:40:473:06:337:306:22
7:27
#9293
25.2M
25.20 mi13:43:383:09:247:312:51
8:16
#9234
Finish
26.22 mi13:51:093:16:557:317:31
7:23
#9181
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi129023261326110864(Top 38%)2302(Top 19%)2302(Top 42%)
10K6.21 mi3.10 mi12420+4823019+2423019+24212007(Top 42%)2818(Top 23%)2818(Top 52%)
15K9.32 mi3.11 mi11880+5402755+2642755+26410864(Top 38%)2302(Top 19%)2302(Top 42%)
20K12.43 mi3.11 mi11435+4452573+1822573+18210333(Top 36%)2125(Top 17%)2125(Top 39%)
Half13.11 mi0.68 mi114352575-22575-211215(Top 39%)2556(Top 21%)2556(Top 47%)
25K15.53 mi2.42 mi11048+3872416+1592416+1599349(Top 33%)1795(Top 15%)1795(Top 33%)
30K18.64 mi3.11 mi10494+5542204+2122204+2128475(Top 30%)1589(Top 13%)1589(Top 29%)
20M20.00 mi1.36 mi10224+2702100+1042100+1047663(Top 27%)1409(Top 12%)1409(Top 26%)
21M21.00 mi1.00 mi9986+2382021+792021+797201(Top 25%)1390(Top 11%)1390(Top 25%)
35K21.75 mi0.75 mi9888+982001+202001+208256(Top 29%)1784(Top 15%)1784(Top 33%)
23M23.00 mi1.25 mi9652+2361924+771924+776857(Top 24%)1340(Top 11%)1340(Top 25%)
24M24.00 mi1.00 mi9434+2181867+571867+576359(Top 22%)1217(Top 10%)1217(Top 22%)
40K24.85 mi0.85 mi9293+1411841+261841+266527(Top 23%)1355(Top 11%)1355(Top 25%)
25.2M25.20 mi0.35 mi9234+591831+101831+107516(Top 26%)1856(Top 15%)1856(Top 34%)
Finish26.22 mi1.02 mi9181+531848-171848-178346(Top 29%)2208(Top 18%)2208(Top 40%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 38%
×21story building
+97ft-345ft

Overall

10864

Females

2302

F18-39

2302

5K→10K

3.1 - 6.2 mi

Top 42%
×5story building
+79ft-138ft

Overall

12007

Females

2818

F18-39

2818

10K→15K

6.2 - 9.3 mi

Top 38%
×3story building
+67ft-78ft

Overall

10864

Females

2302

F18-39

2302

15K→20K

9.3 - 12.4 mi

Top 36%
×5story building
+106ft-86ft

Overall

10333

Females

2125

F18-39

2125

20K→Half

12.4 - 13.1 mi

Top 39%
×2story building
+19ft-37ft

Overall

11215

Females

2556

F18-39

2556

Half→25K

13.1 - 15.5 mi

Top 33%
×4story building
+66ft-88ft

Overall

9349

Females

1795

F18-39

1795

25K→30K

15.5 - 18.6 mi

Top 30%
×9story building
+181ft-148ft

Overall

8475

Females

1589

F18-39

1589

30K→20M

18.6 - 20.0 mi

Top 27%
×5story building
+64ft-50ft

Overall

7663

Females

1409

F18-39

1409

20M→21M

20.0 - 21.0 mi

Top 25%
×8story building
+106ft-24ft

Overall

7201

Females

1390

F18-39

1390

21M→35K

21.0 - 21.8 mi

Top 29%
×7story building
+17ft-86ft

Overall

8256

Females

1784

F18-39

1784

35K→23M

21.8 - 23.0 mi

Top 24%
×5story building
+23ft-63ft

Overall

6857

Females

1340

F18-39

1340

23M→24M

23.0 - 24.0 mi

Top 22%
×6story building
+12ft-82ft

Overall

6359

Females

1217

F18-39

1217

24M→40K

24.0 - 24.9 mi

Top 23%
×1story
+6ft-20ft

Overall

6527

Females

1355

F18-39

1355

40K→25.2M

24.9 - 25.2 mi

Top 26%
×1story
+13ft-16ft

Overall

7516

Females

1856

F18-39

1856

25.2M→Finish

25.2 - 26.2 mi

Top 29%
×2story building
+22ft-21ft

Overall

8346

Females

2208

F18-39

2208

Passing Analysis

Category:
Athletes Passed
4069*
Passed By
347
Net Change
+3721
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#12902
5K → 10K587105+482#12902#12420
10K → 15K56121+540#12420#11880
15K → 20K47227+445#11880#11435
20K → Half32320#11435#11435
Half → 25K40215+387#11435#11048
25K → 30K57016+554#11048#10494
30K → 20M28111+270#10494#10224
20M → 21M256*18+238#10224#9986
21M → 35K11516+98#9986#9888
35K → 23M2459+236#9888#9652
23M → 24M2224+218#9652#9434
24M → 40K15716+141#9434#9293
40K → 25.2M667+59#9293#9234
25.2M → Finish10350+53#9234#9181
TOTALS4069*347+3721

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

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