Boston Marathon logo
BOSTON MARATHON 2025

Lucas Klein

Bib: 5517•M

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 28404
Top 6%
Gender (Male)
#0 / 16105
Top 9%
Masters (Masters Men)
#0 / 10463
Top 2%
Division (M40-44)
#0 / 2247
Top 7%
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
6:11/mi
19:14
↑ 97↓ 3451.5%
10K· 6.21 mi
6:11/mi
38:28
↑ 79↓ 1380.4%
15K· 9.32 mi
6:10/mi
57:36
↑ 67↓ 78
20K· 12.43 mi
6:11/mi
1:16:49
↑ 106↓ 860.1%
Half· 13.11 mi
6:06/mi
1:20:59
↑ 19↓ 370.5%
25K· 15.53 mi
6:11/mi
1:35:59
↑ 66↓ 880.2%
30K· 18.64 mi
6:26/mi
1:55:59
↑ 181↓ 1480.2%
20M
6:29/mi
2:04:48
↑ 64↓ 500.2%
21M
7:12/mi
2:12:00
↑ 106↓ 241.6%
35K· 21.75 mi
6:30/mi
2:16:52
↑ 17↓ 861.7%
23M
6:35/mi
2:25:06
↑ 23↓ 630.6%
24M
6:25/mi
2:31:31
↓ 821.3%
40K· 24.85 mi
6:36/mi
2:37:10
↓ 200.3%
25.2M
7:21/mi
2:39:42
↑ 13↓ 160.2%
Finish· 26.22 mi
6:30/mi
2:46:19
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:20:59
Pace6:11 /mi
2nd Half
Distance13.11 mi
Time1:25:20
Pace6:31 /mi
📊Positive Split: 5.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:22:2119:146:1119:14
6:11
-
10K
6.21 mi10:41:3538:286:1119:14
6:11
0:00
15K
9.32 mi11:00:4357:366:1119:08
6:10
-0:01
20K
12.43 mi11:19:561:16:496:1119:13
6:11
+0:01
Half
13.11 mi11:24:061:20:596:114:10
6:06
-0:05
25K
15.53 mi11:39:061:35:596:1115:00
6:11
+0:05
30K
18.64 mi11:59:061:55:596:1320:00
6:26
+0:15
20M
20.00 mi12:07:552:04:486:148:49
6:29
+0:03
21M
21.00 mi12:15:072:12:006:177:12
7:12
+0:43
35K
21.75 mi12:19:592:16:526:184:52
6:30
-0:42
23M
23.00 mi12:28:132:25:066:198:14
6:35
+0:05
24M
24.00 mi12:34:382:31:316:196:25
6:25
-0:10
40K
24.85 mi12:40:172:37:106:195:39
6:36
+0:11
25.2M
25.20 mi12:42:492:39:426:202:32
7:21
+0:45
Finish
26.22 mi12:49:262:46:196:216:37
6:30
-0:51

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

6:06 /mi

Average Pace

6:21 /mi

Slowest Pace

7:21 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:35:59

58% of race

Time at Steady Pace

1:00:36

36% of race

Time at Slower Pace

9:44

6% of race

Average Pace: 6:21 /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 mi10:22:2119:146:1119:14
6:11
#1813
10K
6.21 mi10:41:3538:286:1119:14
6:11
#1828
15K
9.32 mi11:00:4357:366:1119:08
6:10
#1762
20K
12.43 mi11:19:561:16:496:1119:13
6:11
#1679
Half
13.11 mi11:24:061:20:596:114:10
6:06
#1667
25K
15.53 mi11:39:061:35:596:1115:00
6:11
#1592
30K
18.64 mi11:59:061:55:596:1320:00
6:26
#1590
20M
20.00 mi12:07:552:04:486:148:49
6:29
#1556
21M
21.00 mi12:15:072:12:006:177:12
7:12
#1612
35K
21.75 mi12:19:592:16:526:184:52
6:30
#1626
23M
23.00 mi12:28:132:25:066:198:14
6:35
#1578
24M
24.00 mi12:34:382:31:316:196:25
6:25
#1557
40K
24.85 mi12:40:172:37:106:195:39
6:36
#1552
25.2M
25.20 mi12:42:492:39:426:202:32
7:21
#1559
Finish
26.22 mi12:49:262:46:196:216:37
6:30
#1584
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallMalesM40-44Seg. OverallSeg. MalesSeg. M40-44
5K3.11 mi3.11 mi1813172317231645(Top 6%)1561(Top 10%)1561(Top 69%)
10K6.21 mi3.10 mi1828-151738-151738-151868(Top 7%)1775(Top 11%)1775(Top 79%)
15K9.32 mi3.11 mi1762+661676+621676+621645(Top 6%)1561(Top 10%)1561(Top 69%)
20K12.43 mi3.11 mi1679+831594+821594+821527(Top 5%)1448(Top 9%)1448(Top 64%)
Half13.11 mi0.68 mi1667+121582+121582+121575(Top 6%)1498(Top 9%)1498(Top 67%)
25K15.53 mi2.42 mi1592+751509+731509+731412(Top 5%)1340(Top 8%)1340(Top 60%)
30K18.64 mi3.11 mi1590+21507+21507+21706(Top 6%)1619(Top 10%)1619(Top 72%)
20M20.00 mi1.36 mi1556+341475+321475+321583(Top 6%)1497(Top 9%)1497(Top 67%)
21M21.00 mi1.00 mi1612-561527-521527-523133(Top 11%)2890(Top 18%)2890(Top 129%)
35K21.75 mi0.75 mi1626-141541-141541-142489(Top 9%)2322(Top 14%)2322(Top 103%)
23M23.00 mi1.25 mi1578+481494+471494+471739(Top 6%)1627(Top 10%)1627(Top 72%)
24M24.00 mi1.00 mi1557+211473+211473+211730(Top 6%)1615(Top 10%)1615(Top 72%)
40K24.85 mi0.85 mi1552+51467+61467+62005(Top 7%)1848(Top 11%)1848(Top 82%)
25.2M25.20 mi0.35 mi1559-71474-71474-72754(Top 10%)2456(Top 15%)2456(Top 109%)
Finish26.22 mi1.02 mi1584-251499-251499-252787(Top 10%)2494(Top 15%)2494(Top 111%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 6%
×21story building
+97ft-345ft

Overall

1645

Males

1561

M40-44

1561

5K→10K

3.1 - 6.2 mi

Top 7%
×5story building
+79ft-138ft

Overall

1868

Males

1775

M40-44

1775

10K→15K

6.2 - 9.3 mi

Top 6%
×3story building
+67ft-78ft

Overall

1645

Males

1561

M40-44

1561

15K→20K

9.3 - 12.4 mi

Top 5%
×5story building
+106ft-86ft

Overall

1527

Males

1448

M40-44

1448

20K→Half

12.4 - 13.1 mi

Top 6%
×2story building
+19ft-37ft

Overall

1575

Males

1498

M40-44

1498

Half→25K

13.1 - 15.5 mi

Top 5%
×4story building
+66ft-88ft

Overall

1412

Males

1340

M40-44

1340

25K→30K

15.5 - 18.6 mi

Top 6%
×9story building
+181ft-148ft

Overall

1706

Males

1619

M40-44

1619

30K→20M

18.6 - 20.0 mi

Top 6%
×5story building
+64ft-50ft

Overall

1583

Males

1497

M40-44

1497

20M→21M

20.0 - 21.0 mi

Top 11%
×8story building
+106ft-24ft

Overall

3133

Males

2890

M40-44

2890

21M→35K

21.0 - 21.8 mi

Top 9%
×7story building
+17ft-86ft

Overall

2489

Males

2322

M40-44

2322

35K→23M

21.8 - 23.0 mi

Top 6%
×5story building
+23ft-63ft

Overall

1739

Males

1627

M40-44

1627

23M→24M

23.0 - 24.0 mi

Top 6%
×6story building
+12ft-82ft

Overall

1730

Males

1615

M40-44

1615

24M→40K

24.0 - 24.9 mi

Top 7%
×1story
+6ft-20ft

Overall

2005

Males

1848

M40-44

1848

40K→25.2M

24.9 - 25.2 mi

Top 10%
×1story
+13ft-16ft

Overall

2754

Males

2456

M40-44

2456

25.2M→Finish

25.2 - 26.2 mi

Top 10%
×2story building
+22ft-21ft

Overall

2787

Males

2494

M40-44

2494

Passing Analysis

Category:
Athletes Passed
681
Passed By
452
Net Change
+229
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#1813
5K → 10K85100-15#1813#1828
10K → 15K9428+66#1828#1762
15K → 20K9512+83#1762#1679
20K → Half186+12#1679#1667
Half → 25K838+75#1667#1592
25K → 30K6664+2#1592#1590
30K → 20M4814+34#1590#1556
20M → 21M2177-56#1556#1612
21M → 35K1529-14#1612#1626
35K → 23M6618+48#1626#1578
23M → 24M3615+21#1578#1557
24M → 40K3025+5#1557#1552
40K → 25.2M815-7#1552#1559
25.2M → Finish1641-25#1559#1584
TOTALS681452+229
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing