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BOSTON MARATHON 2025

James Keilbarth

Bib: 5027•M

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Overall
#0 / 28404
Top 7%
Gender (Male)
#0 / 16105
Top 12%
Division (M18-39)
#0 / 5642
Top 29%
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
6:20/mi
19:41
↑ 97↓ 3451.5%
10K· 6.21 mi
6:25/mi
39:37
↑ 79↓ 1380.4%
15K· 9.32 mi
6:23/mi
59:28
↑ 67↓ 78
20K· 12.43 mi
6:22/mi
1:19:16
↑ 106↓ 860.1%
Half· 13.11 mi
6:17/mi
1:23:33
↑ 19↓ 370.5%
25K· 15.53 mi
6:17/mi
1:38:47
↑ 66↓ 880.2%
30K· 18.64 mi
6:24/mi
1:58:40
↑ 181↓ 1480.2%
20M
6:26/mi
2:07:25
↑ 64↓ 500.2%
21M
6:40/mi
2:14:05
↑ 106↓ 241.6%
35K· 21.75 mi
6:13/mi
2:18:44
↑ 17↓ 861.7%
23M
6:46/mi
2:27:12
↑ 23↓ 630.6%
24M
6:35/mi
2:33:47
↓ 821.3%
40K· 24.85 mi
6:52/mi
2:39:39
↓ 200.3%
25.2M
7:29/mi
2:42:14
↑ 13↓ 160.2%
Finish· 26.22 mi
6:32/mi
2:48:53
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:23:33
Pace6:22 /mi
2nd Half
Distance13.11 mi
Time1:25:20
Pace6:31 /mi
📊Positive Split: 2.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:23:2219:416:2019:41
6:20
-
10K
6.21 mi10:43:1839:376:2319:56
6:25
+0:05
15K
9.32 mi11:03:0959:286:2319:51
6:23
-0:02
20K
12.43 mi11:22:571:19:166:2319:48
6:22
-0:01
Half
13.11 mi11:27:141:23:336:224:17
6:17
-0:05
25K
15.53 mi11:42:281:38:476:2215:14
6:17
0:00
30K
18.64 mi12:02:211:58:406:2219:53
6:24
+0:07
20M
20.00 mi12:11:062:07:256:228:45
6:26
+0:02
21M
21.00 mi12:17:462:14:056:236:40
6:40
+0:14
35K
21.75 mi12:22:252:18:446:234:39
6:13
-0:27
23M
23.00 mi12:30:532:27:126:248:28
6:46
+0:33
24M
24.00 mi12:37:282:33:476:246:35
6:35
-0:11
40K
24.85 mi12:43:202:39:396:255:52
6:52
+0:17
25.2M
25.20 mi12:45:552:42:146:262:35
7:29
+0:37
Finish
26.22 mi12:52:342:48:536:276:39
6:32
-0:57

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

6:13 /mi

Average Pace

6:27 /mi

Slowest Pace

7:29 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

4:39

3% of race

Time at Steady Pace

2:14:04

79% of race

Time at Slower Pace

30:10

18% of race

Average Pace: 6:26 /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 mi10:23:2219:416:2019:41
6:20
#2654
10K
6.21 mi10:43:1839:376:2319:56
6:25
#2880
15K
9.32 mi11:03:0959:286:2319:51
6:23
#2864
20K
12.43 mi11:22:571:19:166:2319:48
6:22
#2725
Half
13.11 mi11:27:141:23:336:224:17
6:17
#2688
25K
15.53 mi11:42:281:38:476:2215:14
6:17
#2509
30K
18.64 mi12:02:211:58:406:2219:53
6:24
#2264
20M
20.00 mi12:11:062:07:256:228:45
6:26
#2168
21M
21.00 mi12:17:462:14:056:236:40
6:40
#2079
35K
21.75 mi12:22:252:18:446:234:39
6:13
#2031
23M
23.00 mi12:30:532:27:126:248:28
6:46
#2022
24M
24.00 mi12:37:282:33:476:246:35
6:35
#1997
40K
24.85 mi12:43:202:39:396:255:52
6:52
#2019
25.2M
25.20 mi12:45:552:42:146:262:35
7:29
#2024
Finish
26.22 mi12:52:342:48:536:276:39
6:32
#2054
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM18-39Seg. OverallSeg. MalesSeg. M18-39
5K3.11 mi3.11 mi2654252925292849(Top 10%)2714(Top 17%)2714(Top 48%)
10K6.21 mi3.10 mi2880-2262743-2142743-2143125(Top 11%)2973(Top 18%)2973(Top 53%)
15K9.32 mi3.11 mi2864+162730+132730+132849(Top 10%)2714(Top 17%)2714(Top 48%)
20K12.43 mi3.11 mi2725+1392597+1332597+1332373(Top 8%)2263(Top 14%)2263(Top 40%)
Half13.11 mi0.68 mi2688+372564+332564+332352(Top 8%)2249(Top 14%)2249(Top 40%)
25K15.53 mi2.42 mi2509+1792395+1692395+1691780(Top 6%)1691(Top 10%)1691(Top 30%)
30K18.64 mi3.11 mi2264+2452159+2362159+2361555(Top 5%)1473(Top 9%)1473(Top 26%)
20M20.00 mi1.36 mi2168+962066+932066+931388(Top 5%)1313(Top 8%)1313(Top 23%)
21M21.00 mi1.00 mi2079+891978+881978+881114(Top 4%)1053(Top 7%)1053(Top 19%)
35K21.75 mi0.75 mi2031+481931+471931+471286(Top 5%)1216(Top 8%)1216(Top 22%)
23M23.00 mi1.25 mi2022+91921+101921+102505(Top 9%)2316(Top 14%)2316(Top 41%)
24M24.00 mi1.00 mi1997+251896+251896+252393(Top 8%)2209(Top 14%)2209(Top 39%)
40K24.85 mi0.85 mi2019-221916-201916-203123(Top 11%)2796(Top 17%)2796(Top 50%)
25.2M25.20 mi0.35 mi2024-51920-41920-43283(Top 12%)2873(Top 18%)2873(Top 51%)
Finish26.22 mi1.02 mi2054-301948-281948-282927(Top 10%)2608(Top 16%)2608(Top 46%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 10%
×21story building
+97ft-345ft

Overall

2849

Males

2714

M18-39

2714

5K→10K

3.1 - 6.2 mi

Top 11%
×5story building
+79ft-138ft

Overall

3125

Males

2973

M18-39

2973

10K→15K

6.2 - 9.3 mi

Top 10%
×3story building
+67ft-78ft

Overall

2849

Males

2714

M18-39

2714

15K→20K

9.3 - 12.4 mi

Top 8%
×5story building
+106ft-86ft

Overall

2373

Males

2263

M18-39

2263

20K→Half

12.4 - 13.1 mi

Top 8%
×2story building
+19ft-37ft

Overall

2352

Males

2249

M18-39

2249

Half→25K

13.1 - 15.5 mi

Top 6%
×4story building
+66ft-88ft

Overall

1780

Males

1691

M18-39

1691

25K→30K

15.5 - 18.6 mi

Top 5%
×9story building
+181ft-148ft

Overall

1555

Males

1473

M18-39

1473

30K→20M

18.6 - 20.0 mi

Top 5%
×5story building
+64ft-50ft

Overall

1388

Males

1313

M18-39

1313

20M→21M

20.0 - 21.0 mi

Top 4%
×8story building
+106ft-24ft

Overall

1114

Males

1053

M18-39

1053

21M→35K

21.0 - 21.8 mi

Top 5%
×7story building
+17ft-86ft

Overall

1286

Males

1216

M18-39

1216

35K→23M

21.8 - 23.0 mi

Top 9%
×5story building
+23ft-63ft

Overall

2505

Males

2316

M18-39

2316

23M→24M

23.0 - 24.0 mi

Top 8%
×6story building
+12ft-82ft

Overall

2393

Males

2209

M18-39

2209

24M→40K

24.0 - 24.9 mi

Top 11%
×1story
+6ft-20ft

Overall

3123

Males

2796

M18-39

2796

40K→25.2M

24.9 - 25.2 mi

Top 12%
×1story
+13ft-16ft

Overall

3283

Males

2873

M18-39

2873

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2story building
+22ft-21ft

Overall

2927

Males

2608

M18-39

2608

Passing Analysis

Category:
Athletes Passed
1170
Passed By
570
Net Change
+600
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#2654
5K → 10K54280-226#2654#2880
10K → 15K8973+16#2880#2864
15K → 20K15920+139#2864#2725
20K → Half414+37#2725#2688
Half → 25K1823+179#2688#2509
25K → 30K2527+245#2509#2264
30K → 20M982+96#2264#2168
20M → 21M934+89#2168#2079
21M → 35K513+48#2079#2031
35K → 23M5344+9#2031#2022
23M → 24M4621+25#2022#1997
24M → 40K2345-22#1997#2019
40K → 25.2M914-5#2019#2024
25.2M → Finish2050-30#2024#2054
TOTALS1170570+600
📊

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