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BOSTON MARATHON 2025

William Loomis

Bib: 21961•M

MD

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Gender (Male)
#0 / 16105
Masters (Masters Men)
#0 / 10463
Division (M70-74)
#0 / 228
Top 19%
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
8:46/mi
27:13
↑ 97↓ 3451.5%
10K· 6.21 mi
9:07/mi
55:32
↑ 79↓ 1380.4%
15K· 9.32 mi
8:56/mi
1:23:16
↑ 67↓ 78
20K· 12.43 mi
9:07/mi
1:51:37
↑ 106↓ 860.1%
Half· 13.11 mi
8:51/mi
1:57:39
↑ 19↓ 370.5%
25K· 15.53 mi
9:01/mi
2:19:31
↑ 66↓ 880.2%
30K· 18.64 mi
9:33/mi
2:49:10
↑ 181↓ 1480.2%
20M
9:34/mi
3:02:10
↑ 64↓ 500.2%
21M
10:14/mi
3:12:24
↑ 106↓ 241.6%
35K· 21.75 mi
8:59/mi
3:19:07
↑ 17↓ 861.7%
23M
9:29/mi
3:31:00
↑ 23↓ 630.6%
24M
9:03/mi
3:40:03
↓ 821.3%
40K· 24.85 mi
9:05/mi
3:47:49
↓ 200.3%
25.2M
10:15/mi
3:51:21
↑ 13↓ 160.2%
Finish· 26.22 mi
9:00/mi
4:00:31
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:57:39
Pace8:58 /mi
2nd Half
Distance13.11 mi
Time2:02:52
Pace9:22 /mi
📊Positive Split: 4.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:24:1427:138:4627:13
8:46
-
10K
6.21 mi11:52:3355:328:5628:19
9:07
+0:21
15K
9.32 mi12:20:171:23:168:5627:44
8:56
-0:11
20K
12.43 mi12:48:381:51:378:5928:21
9:07
+0:11
Half
13.11 mi12:54:401:57:398:586:02
8:51
-0:16
25K
15.53 mi13:16:322:19:318:5921:52
9:01
+0:10
30K
18.64 mi13:46:112:49:109:0429:39
9:33
+0:32
20M
20.00 mi13:59:113:02:109:0613:00
9:34
+0:01
21M
21.00 mi14:09:253:12:249:1010:14
10:14
+0:40
35K
21.75 mi14:16:083:19:079:096:43
8:59
-1:15
23M
23.00 mi14:28:013:31:009:1011:53
9:29
+0:30
24M
24.00 mi14:37:043:40:039:109:03
9:03
-0:26
40K
24.85 mi14:44:503:47:499:107:46
9:05
+0:02
25.2M
25.20 mi14:48:223:51:219:113:32
10:15
+1:10
Finish
26.22 mi14:57:324:00:319:119:10
9:00
-1:15

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

8:46 /mi

Average Pace

9:11 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:46:45

94% of race

Time at Steady Pace

13:46

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:10 /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 mi11:24:1427:138:4627:13
8:46
#21300
10K
6.21 mi11:52:3355:328:5628:19
9:07
#22139
15K
9.32 mi12:20:171:23:168:5627:44
8:56
#21978
20K
12.43 mi12:48:381:51:378:5928:21
9:07
#21847
Half
13.11 mi12:54:401:57:398:586:02
8:51
#21802
25K
15.53 mi13:16:322:19:318:5921:52
9:01
#21474
30K
18.64 mi13:46:112:49:109:0429:39
9:33
#21215
20M
20.00 mi13:59:113:02:109:0613:00
9:34
#21061
21M
21.00 mi14:09:253:12:249:1010:14
10:14
#20940
35K
21.75 mi14:16:083:19:079:096:43
8:59
#20832
23M
23.00 mi14:28:013:31:009:1011:53
9:29
#20703
24M
24.00 mi14:37:043:40:039:109:03
9:03
#20586
40K
24.85 mi14:44:503:47:499:107:46
9:05
#20476
25.2M
25.20 mi14:48:223:51:219:113:32
10:15
#20465
Finish
26.22 mi14:57:324:00:319:119:10
9:00
#20434
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM70-74Seg. OverallSeg. MalesSeg. M70-74
5K3.11 mi3.11 mi21300129971299721679(Top 76%)13254(Top 82%)13254(Top 5813%)
10K6.21 mi3.10 mi22139-83913388-39113388-39122870(Top 81%)13749(Top 85%)13749(Top 6030%)
15K9.32 mi3.11 mi21978+16113325+6313325+6321679(Top 76%)13254(Top 82%)13254(Top 5813%)
20K12.43 mi3.11 mi21847+13113268+5713268+5721562(Top 76%)13158(Top 82%)13158(Top 5771%)
Half13.11 mi0.68 mi21802+4513249+1913249+1921089(Top 74%)12939(Top 80%)12939(Top 5675%)
25K15.53 mi2.42 mi21474+32813108+14113108+14119984(Top 70%)12405(Top 77%)12405(Top 5441%)
30K18.64 mi3.11 mi21215+25912960+14812960+14820110(Top 71%)12341(Top 77%)12341(Top 5413%)
20M20.00 mi1.36 mi21061+15412864+9612864+9619463(Top 69%)11911(Top 74%)11911(Top 5224%)
21M21.00 mi1.00 mi20940+12112794+7012794+7019126(Top 67%)11682(Top 73%)11682(Top 5124%)
35K21.75 mi0.75 mi20832+10812729+6512729+6518124(Top 64%)11114(Top 69%)11114(Top 4875%)
23M23.00 mi1.25 mi20703+12912646+8312646+8318652(Top 66%)11290(Top 70%)11290(Top 4952%)
24M24.00 mi1.00 mi20586+11712576+7012576+7017609(Top 62%)10749(Top 67%)10749(Top 4714%)
40K24.85 mi0.85 mi20476+11012514+6212514+6216769(Top 59%)10276(Top 64%)10276(Top 4507%)
25.2M25.20 mi0.35 mi20465+1112498+1612498+1618062(Top 64%)10862(Top 67%)10862(Top 4764%)
Finish26.22 mi1.02 mi20434+3112471+2712471+2719006(Top 67%)11360(Top 71%)11360(Top 4982%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 76%
×21story building
+97ft-345ft

Overall

21679

Males

13254

M70-74

13254

5K→10K

3.1 - 6.2 mi

Top 81%
×5story building
+79ft-138ft

Overall

22870

Males

13749

M70-74

13749

10K→15K

6.2 - 9.3 mi

Top 76%
×3story building
+67ft-78ft

Overall

21679

Males

13254

M70-74

13254

15K→20K

9.3 - 12.4 mi

Top 76%
×5story building
+106ft-86ft

Overall

21562

Males

13158

M70-74

13158

20K→Half

12.4 - 13.1 mi

Top 74%
×2story building
+19ft-37ft

Overall

21089

Males

12939

M70-74

12939

Half→25K

13.1 - 15.5 mi

Top 70%
×4story building
+66ft-88ft

Overall

19984

Males

12405

M70-74

12405

25K→30K

15.5 - 18.6 mi

Top 71%
×9story building
+181ft-148ft

Overall

20110

Males

12341

M70-74

12341

30K→20M

18.6 - 20.0 mi

Top 69%
×5story building
+64ft-50ft

Overall

19463

Males

11911

M70-74

11911

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

19126

Males

11682

M70-74

11682

21M→35K

21.0 - 21.8 mi

Top 64%
×7story building
+17ft-86ft

Overall

18124

Males

11114

M70-74

11114

35K→23M

21.8 - 23.0 mi

Top 66%
×5story building
+23ft-63ft

Overall

18652

Males

11290

M70-74

11290

23M→24M

23.0 - 24.0 mi

Top 62%
×6story building
+12ft-82ft

Overall

17609

Males

10749

M70-74

10749

24M→40K

24.0 - 24.9 mi

Top 59%
×1story
+6ft-20ft

Overall

16769

Males

10276

M70-74

10276

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

18062

Males

10862

M70-74

10862

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2story building
+22ft-21ft

Overall

19006

Males

11360

M70-74

11360

Passing Analysis

Category:
Athletes Passed
2254
Passed By
1388
Net Change
+866
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21300
5K → 10K53892-839#21300#22139
10K → 15K269108+161#22139#21978
15K → 20K250119+131#21978#21847
20K → Half538+45#21847#21802
Half → 25K34315+328#21802#21474
25K → 30K32970+259#21474#21215
30K → 20M18127+154#21215#21061
20M → 21M15433+121#21061#20940
21M → 35K1157+108#20940#20832
35K → 23M15627+129#20832#20703
23M → 24M13013+117#20703#20586
24M → 40K12515+110#20586#20476
40K → 25.2M2514+11#20476#20465
25.2M → Finish7140+31#20465#20434
TOTALS22541388+866
📊

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