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BOSTON MARATHON 2025

George Lo

Bib: 10298•M

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 28404
Top 25%
Gender (Male)
#0 / 16105
Top 37%
Masters (Masters Men)
#0 / 10463
Top 24%
Division (M55-59)
#0 / 1648
Top 8%
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
7:17/mi
22:37
↑ 97↓ 3451.5%
10K· 6.21 mi
7:08/mi
44:47
↑ 79↓ 1380.4%
15K· 9.32 mi
7:08/mi
1:06:58
↑ 67↓ 78
20K· 12.43 mi
7:16/mi
1:29:32
↑ 106↓ 860.1%
Half· 13.11 mi
7:08/mi
1:34:24
↑ 19↓ 370.5%
25K· 15.53 mi
7:08/mi
1:51:42
↑ 66↓ 880.2%
30K· 18.64 mi
7:17/mi
2:14:20
↑ 181↓ 1480.2%
20M
7:18/mi
2:24:15
↑ 64↓ 500.2%
21M
7:49/mi
2:32:04
↑ 106↓ 241.6%
35K· 21.75 mi
7:00/mi
2:37:18
↑ 17↓ 861.7%
23M
7:19/mi
2:46:28
↑ 23↓ 630.6%
24M
7:09/mi
2:53:37
↓ 821.3%
40K· 24.85 mi
7:17/mi
2:59:51
↓ 200.3%
25.2M
7:58/mi
3:02:36
↑ 13↓ 160.2%
Finish· 26.22 mi
6:58/mi
3:09:42
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:34:24
Pace7:12 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:35:18
Pace7:16 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:49:1822:377:1722:37
7:17
-
10K
6.21 mi11:11:2844:477:1222:10
7:08
-0:09
15K
9.32 mi11:33:391:06:587:1122:11
7:08
0:00
20K
12.43 mi11:56:131:29:327:1222:34
7:16
+0:08
Half
13.11 mi12:01:051:34:247:124:52
7:08
-0:08
25K
15.53 mi12:18:231:51:427:1117:18
7:08
0:00
30K
18.64 mi12:41:012:14:207:1222:38
7:17
+0:09
20M
20.00 mi12:50:562:24:157:139:55
7:18
+0:01
21M
21.00 mi12:58:452:32:047:147:49
7:49
+0:31
35K
21.75 mi13:03:592:37:187:145:14
7:00
-0:49
23M
23.00 mi13:13:092:46:287:149:10
7:19
+0:19
24M
24.00 mi13:20:182:53:377:147:09
7:09
-0:10
40K
24.85 mi13:26:322:59:517:146:14
7:17
+0:08
25.2M
25.20 mi13:29:173:02:367:152:45
7:58
+0:41
Finish
26.22 mi13:36:233:09:427:147:06
6:58
-1:00

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

6:58 /mi

Average Pace

7:14 /mi

Slowest Pace

7:58 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:59:08

94% of race

Time at Steady Pace

10:34

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:14 /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 mi10:49:1822:377:1722:37
7:17
#10131
10K
6.21 mi11:11:2844:477:1222:10
7:08
#9507
15K
9.32 mi11:33:391:06:587:1122:11
7:08
#9198
20K
12.43 mi11:56:131:29:327:1222:34
7:16
#9024
Half
13.11 mi12:01:051:34:247:124:52
7:08
#8991
25K
15.53 mi12:18:231:51:427:1117:18
7:08
#8594
30K
18.64 mi12:41:012:14:207:1222:38
7:17
#8072
20M
20.00 mi12:50:562:24:157:139:55
7:18
#7844
21M
21.00 mi12:58:452:32:047:147:49
7:49
#7691
35K
21.75 mi13:03:592:37:187:145:14
7:00
#7560
23M
23.00 mi13:13:092:46:287:149:10
7:19
#7366
24M
24.00 mi13:20:182:53:377:147:09
7:09
#7228
40K
24.85 mi13:26:322:59:517:146:14
7:17
#7135
25.2M
25.20 mi13:29:173:02:367:152:45
7:58
#7079
Finish
26.22 mi13:36:233:09:427:147:06
6:58
#6970
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM55-59Seg. OverallSeg. MalesSeg. M55-59
5K3.11 mi3.11 mi10131823882388611(Top 30%)7316(Top 45%)7316(Top 444%)
10K6.21 mi3.10 mi9507+6247901+3377901+3378939(Top 31%)7565(Top 47%)7565(Top 459%)
15K9.32 mi3.11 mi9198+3097695+2067695+2068611(Top 30%)7316(Top 45%)7316(Top 444%)
20K12.43 mi3.11 mi9024+1747576+1197576+1198714(Top 31%)7280(Top 45%)7280(Top 442%)
Half13.11 mi0.68 mi8991+337555+217555+218462(Top 30%)7145(Top 44%)7145(Top 434%)
25K15.53 mi2.42 mi8594+3977296+2597296+2597180(Top 25%)6239(Top 39%)6239(Top 379%)
30K18.64 mi3.11 mi8072+5226909+3876909+3876361(Top 22%)5560(Top 35%)5560(Top 337%)
20M20.00 mi1.36 mi7844+2286739+1706739+1705766(Top 20%)5027(Top 31%)5027(Top 305%)
21M21.00 mi1.00 mi7691+1536612+1276612+1276266(Top 22%)5234(Top 32%)5234(Top 318%)
35K21.75 mi0.75 mi7560+1316499+1136499+1135307(Top 19%)4589(Top 28%)4589(Top 278%)
23M23.00 mi1.25 mi7366+1946335+1646335+1645568(Top 20%)4712(Top 29%)4712(Top 286%)
24M24.00 mi1.00 mi7228+1386214+1216214+1215495(Top 19%)4592(Top 29%)4592(Top 279%)
40K24.85 mi0.85 mi7135+936127+876127+875580(Top 20%)4599(Top 29%)4599(Top 279%)
25.2M25.20 mi0.35 mi7079+566069+586069+585760(Top 20%)4585(Top 28%)4585(Top 278%)
Finish26.22 mi1.02 mi6970+1095976+935976+935489(Top 19%)4413(Top 27%)4413(Top 268%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 30%
×21story building
+97ft-345ft

Overall

8611

Males

7316

M55-59

7316

5K→10K

3.1 - 6.2 mi

Top 31%
×5story building
+79ft-138ft

Overall

8939

Males

7565

M55-59

7565

10K→15K

6.2 - 9.3 mi

Top 30%
×3story building
+67ft-78ft

Overall

8611

Males

7316

M55-59

7316

15K→20K

9.3 - 12.4 mi

Top 31%
×5story building
+106ft-86ft

Overall

8714

Males

7280

M55-59

7280

20K→Half

12.4 - 13.1 mi

Top 30%
×2story building
+19ft-37ft

Overall

8462

Males

7145

M55-59

7145

Half→25K

13.1 - 15.5 mi

Top 25%
×4story building
+66ft-88ft

Overall

7180

Males

6239

M55-59

6239

25K→30K

15.5 - 18.6 mi

Top 22%
×9story building
+181ft-148ft

Overall

6361

Males

5560

M55-59

5560

30K→20M

18.6 - 20.0 mi

Top 20%
×5story building
+64ft-50ft

Overall

5766

Males

5027

M55-59

5027

20M→21M

20.0 - 21.0 mi

Top 22%
×8story building
+106ft-24ft

Overall

6266

Males

5234

M55-59

5234

21M→35K

21.0 - 21.8 mi

Top 19%
×7story building
+17ft-86ft

Overall

5307

Males

4589

M55-59

4589

35K→23M

21.8 - 23.0 mi

Top 20%
×5story building
+23ft-63ft

Overall

5568

Males

4712

M55-59

4712

23M→24M

23.0 - 24.0 mi

Top 19%
×6story building
+12ft-82ft

Overall

5495

Males

4592

M55-59

4592

24M→40K

24.0 - 24.9 mi

Top 20%
×1story
+6ft-20ft

Overall

5580

Males

4599

M55-59

4599

40K→25.2M

24.9 - 25.2 mi

Top 20%
×1story
+13ft-16ft

Overall

5760

Males

4585

M55-59

4585

25.2M→Finish

25.2 - 26.2 mi

Top 19%
×2story building
+22ft-21ft

Overall

5489

Males

4413

M55-59

4413

Passing Analysis

Category:
Athletes Passed
3473*
Passed By
312
Net Change
+3161
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10131
5K → 10K678*54+624#10131#9507
10K → 15K35243+309#9507#9198
15K → 20K25480+174#9198#9024
20K → Half5017+33#9024#8991
Half → 25K4069+397#8991#8594
25K → 30K5297+522#8594#8072
30K → 20M23810+228#8072#7844
20M → 21M18431+153#7844#7691
21M → 35K1332+131#7691#7560
35K → 23M20410+194#7560#7366
23M → 24M15315+138#7366#7228
24M → 40K10411+93#7228#7135
40K → 25.2M593+56#7135#7079
25.2M → Finish12920+109#7079#6970
TOTALS3473*312+3161

* 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