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BOSTON MARATHON 2025

Lowri Thomas

Bib: 20020•F

TX

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 49%
Gender (Female)
#0 / 12228
Top 35%
Masters (Masters Women)
#0 / 6759
Top 21%
Division (F40-44)
#0 / 1718
Top 42%
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
8:02/mi
24:59
↑ 97↓ 3451.5%
10K· 6.21 mi
7:59/mi
49:47
↑ 79↓ 1380.4%
15K· 9.32 mi
7:59/mi
1:14:34
↑ 67↓ 78
20K· 12.43 mi
8:03/mi
1:39:36
↑ 106↓ 860.1%
Half· 13.11 mi
7:59/mi
1:45:03
↑ 19↓ 370.5%
25K· 15.53 mi
8:03/mi
2:04:34
↑ 66↓ 880.2%
30K· 18.64 mi
8:18/mi
2:30:20
↑ 181↓ 1480.2%
20M
8:17/mi
2:41:36
↑ 64↓ 500.2%
21M
8:44/mi
2:50:20
↑ 106↓ 241.6%
35K· 21.75 mi
8:08/mi
2:56:25
↑ 17↓ 861.7%
23M
8:14/mi
3:06:44
↑ 23↓ 630.6%
24M
8:10/mi
3:14:54
↓ 821.3%
40K· 24.85 mi
8:21/mi
3:22:02
↓ 200.3%
25.2M
8:48/mi
3:25:04
↑ 13↓ 160.2%
Finish· 26.22 mi
7:50/mi
3:33:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:45:03
Pace8:01 /mi
2nd Half
Distance13.11 mi
Time1:48:00
Pace8:14 /mi
📊Positive Split: 2.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:1624:598:0224:59
8:02
-
10K
6.21 mi11:42:0449:478:0124:48
7:59
-0:03
15K
9.32 mi12:06:511:14:348:0024:48
7:59
0:00
20K
12.43 mi12:31:531:39:368:0125:02
8:03
+0:04
Half
13.11 mi12:37:201:45:038:015:27
7:59
-0:04
25K
15.53 mi12:56:512:04:348:0119:31
8:03
+0:04
30K
18.64 mi13:22:372:30:208:0425:46
8:18
+0:15
20M
20.00 mi13:33:532:41:368:0511:16
8:17
-0:01
21M
21.00 mi13:42:372:50:208:078:44
8:44
+0:27
35K
21.75 mi13:48:422:56:258:076:05
8:08
-0:36
23M
23.00 mi13:59:013:06:448:0710:19
8:14
+0:06
24M
24.00 mi14:07:113:14:548:078:10
8:10
-0:04
40K
24.85 mi14:14:193:22:028:087:08
8:21
+0:11
25.2M
25.20 mi14:17:213:25:048:083:02
8:48
+0:27
Finish
26.22 mi14:25:203:33:038:087:59
7:50
-0:58

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

7:50 /mi

Average Pace

8:08 /mi

Slowest Pace

8:48 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:21:17

94% of race

Time at Steady Pace

11:46

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:08 /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 mi11:17:1624:598:0224:59
8:02
#16920
10K
6.21 mi11:42:0449:478:0124:48
7:59
#16599
15K
9.32 mi12:06:511:14:348:0024:48
7:59
#16334
20K
12.43 mi12:31:531:39:368:0125:02
8:03
#16050
Half
13.11 mi12:37:201:45:038:015:27
7:59
#16035
25K
15.53 mi12:56:512:04:348:0119:31
8:03
#15704
30K
18.64 mi13:22:372:30:208:0425:46
8:18
#15250
20M
20.00 mi13:33:532:41:368:0511:16
8:17
#14983
21M
21.00 mi13:42:372:50:208:078:44
8:44
#14749
35K
21.75 mi13:48:422:56:258:076:05
8:08
#14660
23M
23.00 mi13:59:013:06:448:0710:19
8:14
#14458
24M
24.00 mi14:07:113:14:548:078:10
8:10
#14342
40K
24.85 mi14:14:193:22:028:087:08
8:21
#14253
25.2M
25.20 mi14:17:213:25:048:083:02
8:48
#14177
Finish
26.22 mi14:25:203:33:038:087:59
7:50
#14039
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi169205692569215885(Top 56%)5087(Top 42%)5087(Top 296%)
10K6.21 mi3.10 mi16599+3215497+1955497+19516316(Top 57%)5323(Top 44%)5323(Top 310%)
15K9.32 mi3.11 mi16334+2655332+1655332+16515885(Top 56%)5087(Top 42%)5087(Top 296%)
20K12.43 mi3.11 mi16050+2845181+1515181+15115336(Top 54%)4820(Top 39%)4820(Top 281%)
Half13.11 mi0.68 mi16035+155172+95172+915816(Top 56%)5051(Top 41%)5051(Top 294%)
25K15.53 mi2.42 mi15704+3314996+1764996+17614281(Top 50%)4357(Top 36%)4357(Top 254%)
30K18.64 mi3.11 mi15250+4544799+1974799+19713469(Top 47%)4094(Top 33%)4094(Top 238%)
20M20.00 mi1.36 mi14983+2674689+1104689+11012459(Top 44%)3678(Top 30%)3678(Top 214%)
21M21.00 mi1.00 mi14749+2344578+1114578+11111919(Top 42%)3556(Top 29%)3556(Top 207%)
35K21.75 mi0.75 mi14660+894543+354543+3513182(Top 46%)4266(Top 35%)4266(Top 248%)
23M23.00 mi1.25 mi14458+2024463+804463+8011682(Top 41%)3580(Top 29%)3580(Top 208%)
24M24.00 mi1.00 mi14342+1164428+354428+3512387(Top 44%)3993(Top 33%)3993(Top 232%)
40K24.85 mi0.85 mi14253+894416+124416+1212458(Top 44%)4167(Top 34%)4167(Top 243%)
25.2M25.20 mi0.35 mi14177+764383+334383+3310716(Top 38%)3372(Top 28%)3372(Top 196%)
Finish26.22 mi1.02 mi14039+1384336+474336+4711717(Top 41%)3808(Top 31%)3808(Top 222%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21story building
+97ft-345ft

Overall

15885

Females

5087

F40-44

5087

5K→10K

3.1 - 6.2 mi

Top 57%
×5story building
+79ft-138ft

Overall

16316

Females

5323

F40-44

5323

10K→15K

6.2 - 9.3 mi

Top 56%
×3story building
+67ft-78ft

Overall

15885

Females

5087

F40-44

5087

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

15336

Females

4820

F40-44

4820

20K→Half

12.4 - 13.1 mi

Top 56%
×2story building
+19ft-37ft

Overall

15816

Females

5051

F40-44

5051

Half→25K

13.1 - 15.5 mi

Top 50%
×4story building
+66ft-88ft

Overall

14281

Females

4357

F40-44

4357

25K→30K

15.5 - 18.6 mi

Top 47%
×9story building
+181ft-148ft

Overall

13469

Females

4094

F40-44

4094

30K→20M

18.6 - 20.0 mi

Top 44%
×5story building
+64ft-50ft

Overall

12459

Females

3678

F40-44

3678

20M→21M

20.0 - 21.0 mi

Top 42%
×8story building
+106ft-24ft

Overall

11919

Females

3556

F40-44

3556

21M→35K

21.0 - 21.8 mi

Top 46%
×7story building
+17ft-86ft

Overall

13182

Females

4266

F40-44

4266

35K→23M

21.8 - 23.0 mi

Top 41%
×5story building
+23ft-63ft

Overall

11682

Females

3580

F40-44

3580

23M→24M

23.0 - 24.0 mi

Top 44%
×6story building
+12ft-82ft

Overall

12387

Females

3993

F40-44

3993

24M→40K

24.0 - 24.9 mi

Top 44%
×1story
+6ft-20ft

Overall

12458

Females

4167

F40-44

4167

40K→25.2M

24.9 - 25.2 mi

Top 38%
×1story
+13ft-16ft

Overall

10716

Females

3372

F40-44

3372

25.2M→Finish

25.2 - 26.2 mi

Top 41%
×2story building
+22ft-21ft

Overall

11717

Females

3808

F40-44

3808

Passing Analysis

Category:
Athletes Passed
3442
Passed By
561
Net Change
+2881
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16920
5K → 10K488167+321#16920#16599
10K → 15K34883+265#16599#16334
15K → 20K35975+284#16334#16050
20K → Half4631+15#16050#16035
Half → 25K35423+331#16035#15704
25K → 30K50854+454#15704#15250
30K → 20M28114+267#15250#14983
20M → 21M24612+234#14983#14749
21M → 35K11425+89#14749#14660
35K → 23M21715+202#14660#14458
23M → 24M13519+116#14458#14342
24M → 40K11526+89#14342#14253
40K → 25.2M793+76#14253#14177
25.2M → Finish15214+138#14177#14039
TOTALS3442561+2881
📊

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