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BOSTON MARATHON 2025

Rachela Lack

Bib: 12636•F

MI

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 37%
Gender (Female)
#0 / 12228
Top 20%
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
7:28/mi
23:11
↑ 97↓ 3451.5%
10K· 6.21 mi
7:16/mi
45:45
↑ 79↓ 1380.4%
15K· 9.32 mi
7:17/mi
1:08:24
↑ 67↓ 78
20K· 12.43 mi
7:33/mi
1:31:52
↑ 106↓ 860.1%
Half· 13.11 mi
7:29/mi
1:36:58
↑ 19↓ 370.5%
25K· 15.53 mi
7:49/mi
1:55:55
↑ 66↓ 880.2%
30K· 18.64 mi
8:10/mi
2:21:17
↑ 181↓ 1480.2%
20M
7:58/mi
2:32:07
↑ 64↓ 500.2%
21M
8:13/mi
2:40:20
↑ 106↓ 241.6%
35K· 21.75 mi
7:37/mi
2:46:02
↑ 17↓ 861.7%
23M
7:49/mi
2:55:49
↑ 23↓ 630.6%
24M
7:49/mi
3:03:38
↓ 821.3%
40K· 24.85 mi
7:54/mi
3:10:23
↓ 200.3%
25.2M
7:43/mi
3:13:03
↑ 13↓ 160.2%
Finish· 26.22 mi
7:43/mi
3:20:55
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:36:58
Pace7:24 /mi
2nd Half
Distance13.11 mi
Time1:43:57
Pace7:56 /mi
📊Positive Split: 7.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:1323:117:2823:11
7:28
-
10K
6.21 mi11:13:4745:457:2222:34
7:16
-0:12
15K
9.32 mi11:36:261:08:247:2022:39
7:17
+0:01
20K
12.43 mi11:59:541:31:527:2423:28
7:33
+0:16
Half
13.11 mi12:05:001:36:587:245:06
7:29
-0:04
25K
15.53 mi12:23:571:55:557:2818:57
7:49
+0:20
30K
18.64 mi12:49:192:21:177:3525:22
8:10
+0:21
20M
20.00 mi13:00:092:32:077:3610:50
7:58
-0:12
21M
21.00 mi13:08:222:40:207:388:13
8:13
+0:15
35K
21.75 mi13:14:042:46:027:385:42
7:37
-0:36
23M
23.00 mi13:23:512:55:497:399:47
7:49
+0:12
24M
24.00 mi13:31:403:03:387:397:49
7:49
0:00
40K
24.85 mi13:38:253:10:237:406:45
7:54
+0:05
25.2M
25.20 mi13:41:053:13:037:402:40
7:43
-0:11
Finish
26.22 mi13:48:573:20:557:407:52
7:43
0:00

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

7:16 /mi

Average Pace

7:40 /mi

Slowest Pace

8:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:47:20

83% of race

Time at Steady Pace

33:35

17% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:40 /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 mi10:51:1323:117:2823:11
7:28
#11909
10K
6.21 mi11:13:4745:457:2222:34
7:16
#10901
15K
9.32 mi11:36:261:08:247:2022:39
7:17
#10560
20K
12.43 mi11:59:541:31:527:2423:28
7:33
#10693
Half
13.11 mi12:05:001:36:587:245:06
7:29
#10733
25K
15.53 mi12:23:571:55:557:2818:57
7:49
#11006
30K
18.64 mi12:49:192:21:177:3525:22
8:10
#11276
20M
20.00 mi13:00:092:32:077:3610:50
7:58
#11138
21M
21.00 mi13:08:222:40:207:388:13
8:13
#10951
35K
21.75 mi13:14:042:46:027:385:42
7:37
#10871
23M
23.00 mi13:23:512:55:497:399:47
7:49
#10697
24M
24.00 mi13:31:403:03:387:397:49
7:49
#10635
40K
24.85 mi13:38:253:10:237:406:45
7:54
#10559
25.2M
25.20 mi13:41:053:13:037:402:40
7:43
#10430
Finish
26.22 mi13:48:573:20:557:407:52
7:43
#10412
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi11909274427449940(Top 35%)1863(Top 15%)1863(Top 103%)
10K6.21 mi3.10 mi10901+10082259+4852259+48510054(Top 35%)1855(Top 15%)1855(Top 102%)
15K9.32 mi3.11 mi10560+3412102+1572102+1579940(Top 35%)1863(Top 15%)1863(Top 103%)
20K12.43 mi3.11 mi10693-1332191-892191-8911204(Top 39%)2582(Top 21%)2582(Top 142%)
Half13.11 mi0.68 mi10733-402210-192210-1911534(Top 41%)2693(Top 22%)2693(Top 149%)
25K15.53 mi2.42 mi11006-2732389-1792389-17912486(Top 44%)3381(Top 28%)3381(Top 186%)
30K18.64 mi3.11 mi11276-2702610-2212610-22112559(Top 44%)3593(Top 29%)3593(Top 198%)
20M20.00 mi1.36 mi11138+1382575+352575+3510269(Top 36%)2570(Top 21%)2570(Top 142%)
21M21.00 mi1.00 mi10951+1872522+532522+538712(Top 31%)2039(Top 17%)2039(Top 112%)
35K21.75 mi0.75 mi10871+802508+142508+149511(Top 33%)2366(Top 19%)2366(Top 131%)
23M23.00 mi1.25 mi10697+1742458+502458+508709(Top 31%)2128(Top 17%)2128(Top 117%)
24M24.00 mi1.00 mi10635+622460-22460-29956(Top 35%)2786(Top 23%)2786(Top 154%)
40K24.85 mi0.85 mi10559+762444+162444+169455(Top 33%)2656(Top 22%)2656(Top 146%)
25.2M25.20 mi0.35 mi10430+1292403+412403+414385(Top 15%)705(Top 6%)705(Top 39%)
Finish26.22 mi1.02 mi10412+182421-182421-1810905(Top 38%)3426(Top 28%)3426(Top 189%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21story building
+97ft-345ft

Overall

9940

Females

1863

F45-49

1863

5K→10K

3.1 - 6.2 mi

Top 35%
×5story building
+79ft-138ft

Overall

10054

Females

1855

F45-49

1855

10K→15K

6.2 - 9.3 mi

Top 35%
×3story building
+67ft-78ft

Overall

9940

Females

1863

F45-49

1863

15K→20K

9.3 - 12.4 mi

Top 39%
×5story building
+106ft-86ft

Overall

11204

Females

2582

F45-49

2582

20K→Half

12.4 - 13.1 mi

Top 41%
×2story building
+19ft-37ft

Overall

11534

Females

2693

F45-49

2693

Half→25K

13.1 - 15.5 mi

Top 44%
×4story building
+66ft-88ft

Overall

12486

Females

3381

F45-49

3381

25K→30K

15.5 - 18.6 mi

Top 44%
×9story building
+181ft-148ft

Overall

12559

Females

3593

F45-49

3593

30K→20M

18.6 - 20.0 mi

Top 36%
×5story building
+64ft-50ft

Overall

10269

Females

2570

F45-49

2570

20M→21M

20.0 - 21.0 mi

Top 31%
×8story building
+106ft-24ft

Overall

8712

Females

2039

F45-49

2039

21M→35K

21.0 - 21.8 mi

Top 33%
×7story building
+17ft-86ft

Overall

9511

Females

2366

F45-49

2366

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8709

Females

2128

F45-49

2128

23M→24M

23.0 - 24.0 mi

Top 35%
×6story building
+12ft-82ft

Overall

9956

Females

2786

F45-49

2786

24M→40K

24.0 - 24.9 mi

Top 33%
×1story
+6ft-20ft

Overall

9455

Females

2656

F45-49

2656

40K→25.2M

24.9 - 25.2 mi

Top 15%
×1story
+13ft-16ft

Overall

4385

Females

705

F45-49

705

25.2M→Finish

25.2 - 26.2 mi

Top 38%
×2story building
+22ft-21ft

Overall

10905

Females

3426

F45-49

3426

Passing Analysis

Category:
Athletes Passed
2934
Passed By
1437
Net Change
+1497
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11909
5K → 10K104133+1008#11909#10901
10K → 15K38039+341#10901#10560
15K → 20K125258-133#10560#10693
20K → Half2565-40#10693#10733
Half → 25K107380-273#10733#11006
25K → 30K145415-270#11006#11276
30K → 20M18446+138#11276#11138
20M → 21M20720+187#11138#10951
21M → 35K9919+80#10951#10871
35K → 23M20026+174#10871#10697
23M → 24M9836+62#10697#10635
24M → 40K10731+76#10635#10559
40K → 25.2M1290+129#10559#10430
25.2M → Finish8769+18#10430#10412
TOTALS29341437+1497
📊

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